电催化剂
气凝胶
材料科学
贵金属
催化作用
化学工程
纳米颗粒
析氧
电化学
金属
纳米技术
无机化学
电极
化学
有机化学
冶金
工程类
物理化学
作者
Ran Du,Wei Jin,René Hübner,Lin Zhou,Yue Hu,Alexander Eychmüller
标识
DOI:10.1002/aenm.201903857
摘要
Abstract The advent of noble metal aerogels (NMAs), that feature the high catalytic activity of noble metals and unique structural attributes of aerogels, has stimulated research on a new class of outstanding electrocatalysts. However, limited by the available compositions, the explored electrocatalytic reactions on NMAs are highly restricted and certain important electrochemical processes have not been investigated. Here, an effective gelation approach is demonstrated by using a strong salting‐out agent (i.e., NH 4 F), thereby expanding the composition of NMAs to various multimetallic systems and providing a platform to investigate composition‐dependent electrocatalytic performance of NMAs. Combining structural features of aerogels and optimized chemical compositions, the Au–Pt and Au–Rh aerogel catalysts manifest remarkable pH‐universal (pH = 0–14) performance surpassing commercial Pt/C and many other nanoparticle (NP)‐based catalysts in the electrocatalytic oxygen reduction reaction, hydrogen evolution reaction, and water splitting, displaying enormous potential for the electrochemical hydrogen production, fuel cells, etc.
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