Meng Xiaomin, Ouyang Yirui, Wu Huijie, Huang Haowei, Wang Fengqian, Wang Shuo, Jiang Mengchao, Zhang Lian Ying
Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.
Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 400715, PR China.
J Colloid Interface Sci. 2021 Mar 15;586:200-207. doi: 10.1016/j.jcis.2020.10.084. Epub 2020 Oct 30.
Tuning the chemical composition and surface structure of electrodes is demonstrated as a feasible and effective strategy to tailor advanced catalysts for energy electrocatalysis. In this work, hierarchical palladium-silver alloy nanosheets (PdAg NS) with the thickness ~7 atoms and rich atomic defects are successfully prepared, using the carbon monoxide (CO) confinement approach. The optimized PdAg NS/C exhibits 8.8 times higher catalytic peak current density and much better stability toward ethanol electrooxidation than Pd NS/C catalyst. The catalytic enhancement mechanism could be attributed to the synergetic effects among optimized electronic structure of Pd, novel architecture, and rich atomic defects.
调整电极的化学成分和表面结构被证明是一种可行且有效的策略，可用于定制用于能量电催化的先进催化剂。在这项工作中，采用一氧化碳（CO）限制法成功制备了厚度约为7个原子且具有丰富原子缺陷的分级钯银合金纳米片（PdAg NS）。优化后的PdAg NS/C表现出比Pd NS/C催化剂高8.8倍的催化峰值电流密度，并且对乙醇电氧化具有更好的稳定性。催化增强机制可归因于钯的优化电子结构、新颖结构和丰富原子缺陷之间的协同效应。
