催化作用
材料科学
解吸
氢
化学工程
纳米晶
纳米技术
物理化学
吸附
化学
有机化学
工程类
作者
Yaping Li,Shuangming Chen,Ran Long,Huanxin Ju,Wang Zhao-wu,Xiaohua Yu,Fengyi Gao,Zijian Cai,Chengming Wang,Qian Xu,Jun Jiang,Junfa Zhu,Song Li,Yujie Xiong
出处
期刊:Nano Energy
[Elsevier]
日期:2017-04-01
卷期号:34: 306-312
被引量:46
标识
DOI:10.1016/j.nanoen.2017.02.048
摘要
Pd is a versatile catalyst in various hydrogen-related catalytic applications; however, it typically exhibits low activity in electrocatalytic hydrogen evolution reaction (HER) as too strong Pd-H bonding makes the electronic desorption of H adatoms (Had) hardly occur. We herein report a selective etching-deposition approach to implant trace Pd atoms in the near-surface region of Ag nanocrystals, forming a heteratomic-rich Pd-Ag structure on Ag surface. This near-surface dilution of Pd atoms can dramatically facilitate the electronic desorption of Had. As a result, this approach enhances the electrocatalytic HER activity of Pd catalysts about 14 times with excellent performance durability, approaching the high level of Pt catalysts. While enhancing the catalytic performance, this atomic implantation strategy allows the substantial reduction of material costs. This work thus represents a step toward the high-performance, low-cost catalyst design through near-surface lattice engineering.
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