Drop‐casted Platinum Nanocube Catalysts for Hydrogen Evolution Reaction with Ultrahigh Mass Activity. Issue 12 (18th May 2021)

• Record Type: Journal Article
• Authors: Koo, Bonhyeong; Chu, Jinwoo; Seo, Jongsu; Jung, Gihun; Baek, Seung Hee; Nam, Sung‐Wook; Duah, Calem; Lee, Young Kuk; Jung, WooChul; Shin, Byungha
• Is Part Of: ChemSusChem. Volume 14:Issue 12(2021)
• Page Start: 2585
• Page End: 2590
• Publication Date: 2021-05-18
• Subjects: drop-casting -- hydrogen reduction -- nanocubes -- photoelectrochemistry -- water splitting; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202100613
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Platinum hydrogen evolution reaction (HER) electrocatalysts in the form of nanocubes (NCs) were synthesized at 50 °C by aqueous‐based colloidal synthesis and were applied to electrochemical (EC) and photoelectrochemical (PEC) systems by a fast and simple drop‐casting method. A remarkable Pt mass activity of 1.77 A mg −1 at −100 mV was achieved in EC systems (fluorine‐doped tin oxide/Pt NC cathode) with neutral electrolyte while maintaining low overpotential and Tafel slope. In the Cu(In, Ga)(S, Se)2 (CIGS)‐based PEC system, a carefully chosen amount of Pt NC loading to achieve a compromise between the catalytic activity (more Pt NCs) and better light transmittance (fewer Pt NCs) led to a maximum onset potential of 0.678 V against the reference hydrogen electrode. The photoelectrodes with Pt NCs also exhibited good long‐term operational stability over 9.5 h with negligible degradation of the photocurrent. This study presents an effective strategy to greatly reduce the use of expensive Pt without compromising the catalytic performance because the drop‐casting of Pt NC solutions to form electrocatalysts is expected to waste less raw material than vacuum deposition. Abstract : Two birds with one stone : Ultrahigh mass activity of Pt electrocatalysts is reported for hydrogen evolution reaction using drop‐casted Pt nanocubes. Photoelectrodes with the Pt nanocubes also exhibit good long‐term operational stability over 9.5 h with negligible degradation of the photocurrent.