Статья

Cobalt–Iron–Phosphate Hydrogen Evolution Reaction Electrocatalyst for Solar-Driven Alkaline Seawater Electrolyzer

Chiho KimDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, KoreaSeunghun LeeDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, KoreaSeong Hyun KimBK21 Four, Innovative Graduate Education Program for Global High-Tech Materials & Parts, Pusan National University, Busan 46241, KoreaJaehan ParkDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, KoreaShinho KimBK21 Four, Innovative Graduate Education Program for Global High-Tech Materials & Parts, Pusan National University, Busan 46241, KoreaSe‐Hun KwonDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, KoreaJong‐Seong BaeBusan Center, Korea Basic Science Institute, Busan 46724, KoreaYoo Sei ParkDepartment of Chemical Engineering, Kansas State University, 1701A Platt St., Manhattan, KS 66506, USAYoung Do KimDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, Korea

2021en

ABI

Аннотация

Seawater splitting represents an inexpensive and attractive route for producing hydrogen, which does not require a desalination process. Highly active and durable electrocatalysts are required to sustain seawater splitting. Herein we report the phosphidation-based synthesis of a cobalt–iron–phosphate ((Co,Fe)PO4) electrocatalyst for hydrogen evolution reaction (HER) toward alkaline seawater splitting. (Co,Fe)PO4 demonstrates high HER activity and durability in alkaline natural seawater (1 M KOH + seawater), delivering a current density of 10 mA/cm2 at an overpotential of 137 mV. Furthermore, the measured potential of the electrocatalyst ((Co,Fe)PO4) at a constant current density of −100 mA/cm2 remains very stable without noticeable degradation for 72 h during the continuous operation in alkaline natural seawater, demonstrating its suitability for seawater applications. Furthermore, an alkaline seawater electrolyzer employing the non-precious-metal catalysts demonstrates better performance (1.625 V at 10 mA/cm2) than one employing precious metal ones (1.653 V at 10 mA/cm2). The non-precious-metal-based alkaline seawater electrolyzer exhibits a high solar-to-hydrogen (STH) efficiency (12.8%) in a commercial silicon solar cell.

Перевод пока недоступен

Идентификаторы

DOI: 10.3390/nano11112989

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar