文献类型：期刊文献

英文题名：Accelerating Neutral Hydrogen Evolution with Tungsten Modulated Amorphous Metal Hydroxides

作者：Zhang, Le[1];Liu, Peng Fei[1];Li, Yu Hang[1];Wang, Chong Wu[1];Zu, Meng Yang[1];Fu, Huai Qin[1];Yang, Xiao Hua[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2018

卷号：8

期号：6

起止页码：5200

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20181905179726);WOS:【SCI-EXPANDED(收录号:WOS:000434369600044)】；

基金：This work was financially supported by National Natural Science Foundation of China (21573068), National Natural Science Funds for Distinguished Young Scholar (51725201), Fundamental Research Funds for the Central Universities (222201718002, 222201714001), China Postdoctoral Science Foundation Funded Project (2016M601523), National Postdoctoral Program for Innovative Talents (BX201600050), Shanghai Sailing Program (17YF1402900), "Chen Guang" project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (16CG31).

语种：英文

外文关键词：transition-metal hydroxides; tungsten modulation; amorphous; electrodeposition; neutral hydrogen evolution reaction

摘要：Developing efficient, low-cost, and biocompatible electrocatalysts toward hydrogen evolution reaction (HER) in neutral environments is vital to the development of a hybrid water splitting biosynthetic system to achieve high-efficiency solar-to-fuels conversion. We report here a strategy to improve the sluggish HER kinetics on 3d transition metal hydroxides by incorporating tungsten through a one-step electrodeposition method. The prepared amorphous CoW-(OH)(x) delivers high HER activity in neutral solution, which only requires overpotentials of -73.6 and -114.9 mV to achieve the current densities of -10 and -20 mA cm(-2) in 1.0 M phosphate buffer solution (PBS), respectively. The activity can be ascribed to the synergistic effects between Co and W, where Co sites facilitate H2O dissociation to generate H-ad intermediates and W sites could effectively convert H-ad to H-2. Meanwhile, the amorphous architecture features homogeneously dispersed Co and W atoms that avoid crystalline phase separation, further strengthening their collaborative interactions. Similar enhanced HER activity is also observed on the electrodeposited NiW(OH)(x) electrocatalyst, suggesting the universality of this strategy for accelerating HER in neutral environments.