析氧
海水
钴
分解水
电催化剂
催化作用
化学工程
材料科学
氧化钴
无机化学
化学
物理化学
有机化学
电化学
地质学
海洋学
电极
光催化
工程类
作者
Sada Venkateswarlu,Muhammad Umer,Younghu Son,Saravanan Govindaraju,Gayathri Chellasamy,Atanu Panda,Juseong Park,Sohaib Umer,Jeonghyeon Kim,Sang‐Il Choi,Kyusik Yun,Minyoung Yoon,Geunsik Lee,Myung Jong Kim
出处
期刊:Small
[Wiley]
日期:2023-08-30
卷期号:20 (1)
被引量:1
标识
DOI:10.1002/smll.202305289
摘要
Abstract Green fuel from water splitting is hardcore for future generations, and the limited source of fresh water (<1%) is a bottleneck. Seawater cannot be used directly as a feedstock in current electrolyzer techniques. Until now single atom catalysts were reported by many synthetic strategies using notorious chemicals and harsh conditions. A cobalt single‐atom (CoSA) intruding cobalt oxide ultrasmall nanoparticle (Co 3 O 4 USNP)‐intercalated porous carbon (PC) (CoSA‐Co 3 O 4 @PC) electrocatalyst was synthesized from the waste orange peel as a single feedstock (solvent/template). The extended X‐ray absorption fine structure spectroscopy (EXAFS) and theoretical fitting reveal a clear picture of the coordination environment of the CoSA sites (CoSA‐Co 3 O 4 and CoSA‐N 4 in PC). To impede the direct seawater corrosion and chlorine evolution the seawater has been desalinated (Dseawater) with minimal cost and the obtained PC is used as an adsorbent in this process. CoSA‐Co 3 O 4 @PC shows high oxygen evolution reaction (OER) activity in transitional metal impurity‐free (TMIF) 1 M KOH and alkaline Dseawater. CoSA‐Co 3 O 4 @PC exhibits mass activity that is 15 times higher than the commercial RuO 2 . Theoretical interpretations suggest that the optimized CoSA sites in Co 3 O 4 USNPs reduce the energy barrier for alkaline water dissociation and simultaneously trigger an excellent OER followed by an adsorbate evolution mechanism (AEM).
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