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Copper‐doped nickel oxyhydroxide for efficient electrocatalytic ethanol oxidation

Chinese Journal of Catalysis 2022年第6期43卷 1478-1484页

作者： Huining Wang Anxiang Guan Junbo Zhang Yuying Mi Si Li Taotao Yuan Chao Jing Lijuan Zhang Linjuan Zhang Gengfeng Zheng Laboratory of Advanced Materials Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFaculty of Chemistry and Materials ScienceFudan UniversityShanghai 200438China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

Rational design of low‐cost and efficient electrocatalysts for ethanol oxidation reaction(EOR)is imperative for electrocatalytic ethanol fuel *** this work,we developed a copper‐doped nickel oxyhydroxide(Cu‐doped NiOOH)catalyst via in situ electrochemical reconstruction of a NiCu *** introduction of Cu dopants increases the specific surface area and more defect sites,as well as forms high‐valence Ni *** Cu‐doped NiOOH electrocatalyst exhibited an excellent EOR performance with a peak current density of 227 mA·cm^(–2)at 1.72 V versus reversible hydrogen electrode,high Faradic efficiencies for acetate production(>98%),and excellent electrochemical *** work suggests an attractive route of designing non‐noble metal based electrocatalysts for ethanol oxidation.

关键词： Ethanol oxidation reaction Electrocatalyst Cu doping nickel oxyhydroxide Acetate

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Photodeposition fabrication of hierarchical layered Co-doped Ni oxyhydroxide(NixCo1−xOOH)catalysts with enhanced electrocatalytic performance for oxygen evolution reaction

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Nano Research 2020年第1期13卷 246-254页

作者： Liang-ai Huang Zhishun He Jianfeng Guo Shi-en Pei Haibo Shao Jianming Wang Department of Chemistry Zhejiang UniversityHangzhou310027China

Highly active,durable and inexpensive oxygen evolution reaction(OER)catalysts are crucial for achieving practical and high-efficiency water ***,hierarchical interconnected NixCo1−xOOH nanosheet arrays supported on TiO2/Ti substrate have been fabricated through a facile photodeposition *** with pristine NiOOH,the obtained NixCo1−xOOH nanosheet arrays possess larger exposed electrochemical active surface area,faster transfer and collection of electrons and stronger electronic interaction,showing a low overpotential of 350 mV at a current density of 10 mA·cm−2 and a small Tafel slope of 41 mV·dec−1 in basic solutions,with the OER performance superior to pristine NiOOH and most Ni-based ***,the NixCo1−xOOH electrode demonstrates excellent stability at the current density of 10 mA·cm−2 for 24 hours,which is attributed to the structural maintenance caused by the good adhesion of the catalyst and the *** study provides an alternative approach for the rational design of highly active and promising OER electrocatalysts.

关键词： nickel oxyhydroxide cobalt incorporation photodeposition electrocatalyst oxygen evolution reaction

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Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system

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Chinese Chemical Letters 2022年第2期33卷 930-934页

作者： Cong Lyu Lu Zhang Dan He Boyuan Su Ying Lyu Key Lab of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130026China Jilin Provincial Key Laboratory of Water Resources and Environment Jilin UniversityChangchun 130026China Department of Chemistry and Environmental Science New Jersey Institute of TechnologyNewarkNJ 07102United States

As an antibiotic,sulfadiazine has posed a serious threat to humans and ecosystems due to its chronic *** advanced oxidation processes (AOPs) via heterogeneous catalytic activation of peroxymonosulfate (PMS) have significant potential for the degradation of ***,there are multiple restrictions including non-specifically binding to target contaminants,which would deplete oxidation capacity,and lacking energy effectiveness due to inefficient utilization of reactive oxygen species (ROS).To overcome these obstacles,we adopted the“bait-hook&destroy”strategy in this ***,we synthesized a novel micrometer-sized Ni OOH hierarchical spheres assembled from nanosheets,which have relatively large specific surface areas and yield specified cavities to“bait-hook”sulfadiazine and PMS onto the surface *** process was further conductive to effective generation of ROS and subsequently“destruction”of sulfadiazine with elevated mass transformation rate.20.4%of sulfadiazine can adsorb to Ni OOH surface in less than 30 min (0.0051 min^(-1)),and then sulfadiazine was completely degraded in 90min intervals in the Ni OOH/PMS *** degradation rate constant (k=0.0537 min^(-1)) was about5.3,2.5 and 2.2 times higher than that in Ni_(2)O_(3)/PMS,NiO/PMS and Ni(OH)_(2)/PMS system,*** was ascribed to the synergistic catalytic oxidation and adsorption process occurred on the surface of Ni ***,there were both non-radicals (^(1)O_(2)) and radicals (O_(2)^(·-)and SO_(4)^(·-)) involved in the Ni OOH/PMS system,and^(1)O_(2)was distinguished as the dominated ROS for degradation of *** study provides a novel strategy via synergistic adsorption and catalytic oxidation,and indicates that the micrometer-sized Ni OOH hierarchical sphere as heterogeneous catalyst is an attractive candidate for potential application of the SR-AOPs technology in water treatment.

关键词： nickel oxyhydroxide Peroxymonosulfate Sulfate radical Singlet oxygen Sulfadiazine

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