材料科学
亚硝酸盐
拉曼光谱
电化学
氧化物
煅烧
尖晶石
氨
无机化学
化学工程
分析化学(期刊)
化学
电极
物理化学
催化作用
硝酸盐
冶金
光学
物理
有机化学
生物化学
色谱法
工程类
作者
Talshyn Begildayeva,Jayaraman Theerthagiri,Wanwisa Limphirat,Ahreum Min,Soorathep Kheawhom,Myong Yong Choi
出处
期刊:Small
[Wiley]
日期:2024-04-11
标识
DOI:10.1002/smll.202400538
摘要
Abstract This research adopts a new method combining calcination and pulsed laser irradiation in liquids to induce a controlled phase transformation of Fe, Co, Ni, Cu, and Mn transition‐metal‐based high‐entropy Prussian blue analogs into single‐phase spinel high‐entropy oxide and face‐centered cubic high‐entropy alloy (HEA). The synthesized HEA, characterized by its highly conductive nature and reactive surface, demonstrates exceptional performance in capturing low‐level nitrite (NO 2 − ) in an electrolyte, which leads to its efficient conversion into ammonium (NH 4 + ) with a Faradaic efficiency of 79.77% and N selectivity of 61.49% at −0.8 V versus Ag/AgCl. In addition, the HEA exhibits remarkable durability in the continuous nitrite reduction reaction (NO 2 − RR), converting 79.35% of the initial NO 2 − into NH 4 + with an impressive yield of 1101.48 µ m h −1 cm −2 . By employing advanced X‐ray absorption and in situ electrochemical Raman techniques, this study provides insights into the indirect NO 2 − RR, highlighting the versatility and efficacy of HEA in sustainable electrochemical applications.
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