材料科学
电催化剂
海水
联氨(抗抑郁剂)
异质结
相(物质)
析氧
分解水
化学工程
催化作用
无机化学
电化学
化学
光电子学
有机化学
物理化学
电极
光催化
海洋学
工程类
地质学
色谱法
作者
Qingping Yu,Xiaobin Liu,Guishan Liu,Xinping Wang,Zhenjiang Li,Bin Li,Zexing Wu,Lei Wang
标识
DOI:10.1002/adfm.202205767
摘要
Abstract Rational design of highly efficient, robust, and low‐cost trifunctional electrocatalysts for oxygen reduction reaction (ORR), hydrazine oxidation reaction (HzOR), and hydrogen evolution reaction (HER) is extremely urgent for seawater‐based renewable energy conversion and storage, including direct hydrazine fuel cells (DHzFC) and overall hydrazine splitting (OHzS). Herein, FeP/FeNi 2 P encapsulated in N, P co‐doped hierarchical carbon (FeNiP‐NPHC) in situ grown on nickel foam is fabricated via a hydrothermal‐pyrolysis‐phosphidation procedure. Benefiting from the strong coupling effect among FeP, FeNi 2 P, and N, P co‐doped carbon at the three‐phase heterojunction interface, as well as the unique 1D/3D hierarchical structure, the as‐prepared FeNiP‐NPHC shows superior ORR ( E 1/2 = 0.83 V), HzOR ( E 100 = 7 mV), and HER ( E 100 = ‐180 mV) performance in alkaline seawater. Density functional theory functions indicate that constructing three‐phase heterojunction interface of FeNiP‐NPHC can effectively adjust the d‐band center and electronic structure, which is conductive to balance and optimize the trifunctional electrocatalytic performance. As proof of concept, the self‐assembled DHzFC is utilized to power the OHzS in alkaline seawater successfully, verifying application potential of the FeNiP‐NPHC as trifunctional electrocatalyst.
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