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Activity promotion of Rh_(1)Ca_(x)/Al_(2)O_(3) single-atom catalyst in 1-octene hydroformylation:a volcano curve exists between Ca adding ratio and catalytic activity

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Science China Chemistry 2024年第4期67卷 1187-1192页

作者： Hao Zhang Xingcong Zhang Xilun Wang Qingdi Sun Hao Liu hongbing ji Xiaohui He Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275China Huizhou Research Institute Sun Yat-sen UniversityHuizhou 516081China State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Single-atom catalysts(SACs)are considered the best candidates for olefin hydroformylation due to their combined advantages of homogeneous and heterogeneous catalysts.Unlike conventional organo-phosphine modification,Rh SAC is modified by introducing Ca,resulting in a significant increase in activity(maximum~5.7-fold)and stability.Furthermore,a volcano curve between Ca addition ratio and catalytic activity is found.Introducing Ca significantly increases activity by decreasing the energy barrier,but excessive Ca decreases activity due to hindering substrate adsorption and reaction.

关键词： hydroformylation bimetallic single-atom catalysts rhodium heterogeneous catalyst

Systematic engineering of BiVO_(4)photoanode for efficient photoelectrochemical water oxidation

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Carbon Energy 2024年第4期6卷 12-21页

作者： Zhiting Liang Meng Li Kai‐Hang Ye Tongxin Tang Zhan Lin Yuying Zheng Yongchao Huang hongbing ji Shanqing Zhang Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhouChina Chemical Engineering Guangdong Laboratory Jieyang Branch of ChemistryJieyangChina Key Laboratory for Water Quality and Conservation of the Pearl River Delta Institute of Environmental Research at Greater Bay AreaMinistry of EducationGuangzhou UniversityGuangzhouChina State Key Laboratory Breeding Base of Green‐Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhouChina School of Environment and Science Centre for Catalysis and Clean EnergyGriffith UniversityGold Coast CampusSouthportQueenslandAustralia

BiVO_(4)is one of the most promising photoanode materials for photoelectrochemical(PEC)solar energy conversion,but it still suffers from poor photocurrent density due to insufficient light‐harvesting efficiency(LHE),weak photogenerated charge separation efficiency(Φ_(Sep)),and low water oxidation efficiency(Φ_(OX)).Herein,we tackle these challenges of the BiVO_(4)photoanodes using systematic engineering,including catalysis engineering,bandgap engineering,and morphology engineering.In particular,we deposit a NiCoO_(x)layer onto the BiVO_(4)photoanode as the oxygen evolution catalyst to enhance theΦ_(OX)of Fe‐g‐C_(3)N_(4)/BiVO_(4)for PEC water oxidation,and incorporate Fe‐doped graphite‐phase C_(3)N_(4)(Fe‐g‐C_(3)N_(4))into the BiVO_(4)photoanode to optimize the bandgap and surface areas to subsequently expand the light absorption range of the photoanode from 530 to 690 nm,increase the LHE andΦ_(Sep),and further improve the oxygen evolution reaction activity of the NiCoO_(x)catalytic layer.Consequently,the maximum photocurrent density of the as‐prepared NiCoO_(x)/Fe‐g‐C_(3)N_(4)/BiVO_(4)is remarkably boosted from 4.6 to 7.4 mA cm^(−2).This work suggests that the proposed systematic engineering strategy is exceptionally promising for improving LHE,Φ_(Sep),andΦ_(OX)of BiVO_(4)‐based photoanodes,which will substantially benefit the design,preparation,and large‐scale application of next‐generation high‐performance photoanodes.

关键词： bismuth vanadate carbon nitride charge separation heterojunction water oxidation

Activity promotion of RhCa/AlOsingle-atom catalyst in1-octene hydroformylation: a volcano curve exists between Ca adding ratio and catalytic activity

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Science China Chemistry 2024年

作者： Hao Zhang Xingcong Zhang Xilun Wang Qingdi Sun Hao Liu hongbing ji Xiaohui He Huizhou Research Institute Sun Yat-sen University Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research Institute School of Chemistry IGCME Sun Yat-sen University State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon Conversion College of Chemical Engineering Zhejiang University of Technology

Single-atom catalysts(SACs) are considered the best candidates for olefin hydroformylation due to their combined advantages of homogeneous and heterogeneous catalysts. Unlike conventional organo-phosphine modification, Rh SAC is modified by introducing Ca, resulting in a significant increase in activity(maximum ～5.7-fold) and stability. Furthermore, a volcano curve between Ca addition ratio and catalytic activity is found. Introducing Ca significantly increases activity by decreasing the energy barrier, but excessive Ca decreases activity due to hindering substrate adsorption and reaction.

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A robust Poisson multi-Bernoulli filter for multi-target tracking based on arithmetic average fusion

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Chinese Journal of Aeronautics 2023年第2期36卷 179-190页

作者： Zhenzhen SU hongbing ji Cong TIAN Yongquan ZHANG School of Computer Science and Technology Xidian UniversityXi'an 710071China School of Electronic Engineering Xidian UniversityXi'an 710071China

The coalescence and missed detection are two key challenges in Multi-Target Tracking(MTT).To balance the tracking accuracy and real-time performance,the existing Random Finite Set(RFS)based filters are generally difficult to handle the above problems simultaneously,such as the Track-Oriented marginal Multi-Bernoulli/Poisson(TOMB/P)and Measurement-Oriented marginal Multi-Bernoulli/Poisson(MOMB/P)filters.Based on the Arithmetic Average(AA)fusion rule,this paper proposes a novel fusion framework for the Poisson Multi-Bernoulli(PMB)filter,which integrates both the advantages of the TOMB/P filter in dealing with missed detection and the advantages of the MOMB/P filter in dealing with coalescence.In order to fuse the different PMB distributions,the Bernoulli components in different Multi-Bernoulli(MB)distributions are associated with each other by Kullback-Leibler Divergence(KLD)minimization.Moreover,an adaptive AA fusion rule is designed on the basis of the exponential fusion weights,which utilizes the TOMB/P and MOMB/P updates to solve these difficulties in MTT.Finally,by comparing with the TOMB/P and MOMB/P filters,the performance of the proposed filter in terms of accuracy and efficiency is demonstrated in three challenging scenarios.

关键词： Arithmetic average fusion Kullback-Leibler divergence Poisson multi-Bernoulli filter Random finite set Target tracking

Online multi-target intelligent tracking using a deep long-short term memory network

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中国航空学报:英文版 2023年第9期36卷 313-329页

作者： Yongquan ZHANG Zhenyun SHI hongbing ji Zhenzhen SU School of Electronic Engineering Xidian UniversityXi’an 710071China School of Computer Science and Technology Xidian UniversityXi’an 710071China

Multi-target tracking is facing the difficulties of modeling uncertain motion and observation noise.Traditional tracking algorithms are limited by specific models and priors that may mismatch a real-world scenario.In this paper,considering the model-free purpose,we present an online Multi-Target Intelligent Tracking(MTIT)algorithm based on a Deep Long-Short Term Memory(DLSTM)network for complex tracking requirements,named the MTIT-DLSTM algorithm.Firstly,to distinguish trajectories and concatenate the tracking task in a time sequence,we define a target tuple set that is the labeled Random Finite Set(RFS).Then,prediction and update blocks based on the DLSTM network are constructed to predict and estimate the state of targets,respectively.Further,the prediction block can learn the movement trend from the historical state sequence,while the update block can capture the noise characteristic from the historical measurement sequence.Finally,a data association scheme based on Hungarian algorithm and the heuristic track management strategy are employed to assign measurements to targets and adapt births and deaths.Experimental results manifest that,compared with the existing tracking algorithms,our proposed MTIT-DLSTM algorithm can improve effectively the accuracy and robustness in estimating the state of targets appearing at random positions,and be applied to linear and nonlinear multi-target tracking scenarios.

关键词： Data association Deep long-short term memory network Historical sequence Multi-target tracking Target tuple set Track management

Experimental simulation of capillary effect on rough flat surfaces

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Particuology 2022年第1期20卷 115-123页

作者： Ziwen Zuo Junfeng Wang Yuanping Huo Dongbao Wang hongbing ji Institute for Energy Research Jiangsu UniversityZhenjiang 212013China School of Energy and Power Engineering Jiangsu University.Zhenjiang 212013China Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen UniversityGuangzhou 510275China

The movement of the liquid column inside the slit was utilized to experimentally simulate the characteristics of the capillary force per unit length for different rough flat surfaces.The movement of the liquid column was achieved by continuously changing the slit interval.The maximum climb height and contact angle of the liquid column were observed during this process to study the relationship between capillary force and contact surface roughness.Based on the assumption that the microstructures on the rough surfaces are of the same form and continuously and uniformly distributed,it is shown that the capillary force per unit length under homogeneous wetting is independent of the roughness.For heterogeneous wetting,the capillary force per unit length is positively correlated with the roughness.The results also indicate that the appearance of"contact line pinning"is caused by insufficient capillary force along the direction of liquid column movement.

关键词： Contact angle Contact line Capillary force Rough surfaces

In situ growth of cobalt on ultrathin Ti_(3)C_(2)T_(x)as an efficient cocatalyst of g-C_(3)N_(4)for enhanced photocatalytic CO_(2)reduction

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Chinese Journal of Chemical Engineering 2023年第12期64卷 76-86页

作者： Tongming Su Jundong Meng Ya Xiao Liuyun Chen hongbing ji Zuzeng Qin School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification TechnologyGuangxi UniversityNanning 530004China Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Photocatalytic CO_(2)reduction to valuable product exhibit promising prospect for solving the energy crisis and the greenhouse effect.Herein,Co-Ti_(3)C_(2)T_(x)/g-C_(3)N_(4)(Co-TC/CN)composite with enhanced photocatalytic performance for converting CO_(2)to CO and CH_(4)was constructed by electrostatic self-assembly method.The close contact interface between Co-Ti_(3)C_(2)T_(x)and g-C_(3)N_(4)nanosheets can be used as fast transport channels of photogenerated electrons and effectively promote the separation of photogenerated electrons and holes,and the interface between the Co and Ti_(3)C_(2)T_(x)might be the active sites for CO_(2)adsorption and activation.The optimized Co-Ti_(3)C_(2)T_(x)/g-C_(3)N_(4)composite exhibited the highest photocatalytic performance with the CO and CH_(4)production of 55.04 μmol·g^(-1)and 2.29 μmol·g^(-1),respectively,which were 7.5 times and 5.8 times than those of g-C_(3)N_(4).Furthermore,the stability of g-C_(3)N_(4)was improved after coupling with Co-Ti_(3)C_(2)T_(x).

关键词： g-C_(3)N_(4) MXene Cobalt Photocatalytic CO_(2)reduction

Controlling hydrogenation of C=C and C=O bonds in cinnamaldehyde using Pt1/Ni and Pt1/Co single-atom alloy catalysts

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Rare Metals 2024年第6期43卷 2859-2868页

作者： Huan-Shi Lan Yi-Da Yang Qing-Di Sun Hao Zhang Ying Zhang Qian He Ran Chen Guo-Yi Bai Xiao-Hui He Hong-Bing ji School of Chemistry and Chemical Engineering Guangxi University Key Laboratory of Bioinorganicand Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen University UBFC CNRSENSMMFEMTO-ST Institute College of Chemistry and Materials Science Hebei University State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of Technology

Selective hydrogenation of C=C and C=O bonds in cinnamaldehyde (CAL) to produce desired products is a challenging task due to the complex conjugate system of the two unsaturated functional groups.In this study,a simple ball milling method is presented for synthesizing Pt-based single-atom alloy catalysts (SAAs) that can function as a control switch for the selective hydrogenation of CAL into highly valuable products.

关键词： SELECTIVE HYDROGENATION CHEMOSELECTIVE HYDROGENATION NANOPARTICLES GENERATION EFFICIENT FE CO

Single Cu atom dispersed on S,N-codoped nanocarbon derived from shrimp shells for highly-efficient oxygen reduction reaction

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Nano Research 2022年第7期15卷 5995-6000页

作者： Hao Zhang Qingdi Sun Qian He Ying Zhang Xiaohui He Tao Gan hongbing ji Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China School of Chemical Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China

Recently,Cu-based single-atom catalysts(SACs)have garnered increasing attention as substitutes for platinum-based catalysts in the oxygen reduction reaction(ORR).Therefore,a facile,economical,and efficient synthetic methodology for the preparation of a high-performance Cu-based SAC electrocatalyst for the ORR is extremely desired,but is also significantly challenging.In this study,we propose a ball-milling method to synthesize isolated metal SACs embedded in S,N-codoped nanocarbon(MNSDC,M=Cu,Fe,Co,Ni,Mn,Pt,and Pd).In particular,the Cu-NSDC SACs exhibit high electrochemical activity for the ORR with half-wave potential(E_(1/2))of 0.84 V(vs.reversible hydrogen electrode(RHE),20 mV higher than Pt/C)in alkaline electrolyte,excellent stability,and electrocatalytic selectivity.Density functional theory(DFT)calculations demonstrated that the desorption of OH*intermediates was the rate-determining step over Cu-NSDC.This study creates a pathway for high-performance ORR single atomic electrocatalysts for fuel cell applications and provides opportunities to convert biowaste materials into commercial opportunities.

关键词： ball milling oxygen reduction reaction single-atom catalysis shrimp shell S,N-codoped nanocarbon