Direct Synthesis of Molybdenum Phosphide Nanorods on Silicon Using Graphene at the Heterointerface for Efficient Photoelectrochemical Water Reduction

作     者：Sang Eon Jun Seokhoon Choi Shinyoung Choi Tae Hyung Lee Changyeon Kim Jin Wook Yang Woon‑Oh Choe In‑Hyuk Im Cheol‑Joo Kim Ho Won Jang Sang Eon Jun;Seokhoon Choi;Shinyoung Choi;Tae Hyung Lee;Changyeon Kim;Jin Wook Yang;Woon-Oh Choe;In-Hyuk Im;Cheol-Joo Kim;Ho Won Jang

作者机构：Department of Materials Science and EngineeringResearch Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Department of Chemical EngineeringPohang University of Science and TechnologyPohang 37673Republic of Korea 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2021年第13卷第5期

页      面：135-150页

核心收录：

学科分类：081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the Basic Science Research Program(2017R1A2B3009135) the Korean government MSIT(2019M3E6A1103818) the Basic Research Laboratory Program(2018R1A4A1022647) the Future Material Discovery Program(2018M3D1A1058793)through the National Research Foundation of Korea KOREA HYDRO&NUCLEAR POWER CO.,LTD.(No.2018-Tech-21) 

主　　题：Photoelectrochemical water splitting Silicon Molybdenum phosphide Hydrogen evolution Graphene 

摘      要：Transition metal phosphides(TMPs)and transition metal dichalcogenides(TMDs)have been widely investigated as photoelectrochemical(PEC)catalysts for hydrogen evolution reaction(HER).Using high-temperature processes to get crystallized compounds with large-area uniformity,it is still challenging to directly synthesize these catalysts on silicon photocathodes due to chemical incompatibility at the ***,a graphene interlayer is applied between p-Si and MoP nanorods to enable fully engineered interfaces without forming a metallic secondary compound that absorbs a parasitic light and provides an inefficient electron path for hydrogen ***,the graphene facilitates the photogenerated electrons to rapidly transfer by creating Mo-O-C covalent bondings and energetically favorable band *** a bridging role of graphene,numerous active sites and anti-reflectance of MoP nanorods lead to significantly improved PEC-HER performance with a high photocurrent density of 21.8 mA cm−2 at 0 V versus RHE and high ***,low dependence on pH and temperature is observed with MoP nanorods incorporated photocathodes,which is desirable for practical use as a part of PEC *** results indicate that the direct synthesis of TMPs and TMDs enabled by graphene interlayer is a new promising way to fabricate Si-based photocathodes with high-quality interfaces and superior HER performance.