Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis,Advanced Energy Materials

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Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-02-18 , DOI: 10.1002/aenm.201903857
Ran Du ₁ , Wei Jin _{1,

2} , René Hübner ₃ , Lin Zhou ₄ , Yue Hu ₄ , Alexander Eychmüller ₁

Affiliation

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., NH₄F), 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.

中文翻译：

用于pH通用HER和ORR电催化的工程多金属气凝胶

具有贵金属的高催化活性和气凝胶独特的结构特征的贵金属气凝胶（NMA）的出现，激发了对新型杰出电催化剂的研究。但是，受可用组合物的限制，在NMA上探索的电催化反应受到严格限制，并且尚未研究某些重要的电化学过程。在这里，通过使用强盐析剂（即NH ₄F），从而将NMA的组成扩展到各种多金属系统，并提供了一个平台来研究NMA的成分依赖性电催化性能。结合气凝胶的结构特征和优化的化学成分，Au–Pt和Au–Rh气凝胶催化剂表现出卓越的pH通用性（pH = 0–14）性能，超过了工业Pt / C和许多其他基于纳米颗粒（NP）的催化剂。电催化氧还原反应，氢释放反应和水分解，在电化学制氢，燃料电池等方面显示出巨大的潜力。

更新日期：2020-03-27

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