Morphology-Tuned Pt3 Ge Accelerates Water Dissociation to Industrial-Standard Hydrogen Production over a wide pH Range

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 30 vom: 08. Juli, Seite e2202294
1. Verfasser:	Mondal, Soumi (VerfasserIn)
Weitere Verfasser:	Sarkar, Shreya, Bagchi, Debabrata, Das, Tisita, Das, Risov, Singh, Ashutosh Kumar, Prasanna, Ponnappa Kechanda, Vinod, C P, Chakraborty, Sudip, Peter, Sebastian C
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article electrochemistry hydrogen production intermetallics water electrolysis

Beschreibung
Zusammenfassung:	© 2022 Wiley-VCH GmbH. The discovery of novel materials for industrial-standard hydrogen production is the present need considering the global energy infrastructure. A novel electrocatalyst, Pt3 Ge, which is engineered with a desired crystallographic facet (202), accelerates hydrogen production by water electrolysis, and records industrially desired operational stability compared to the commercial catalyst platinum is introduced. Pt3 Ge-(202) exhibits low overpotential of 21.7 mV (24.6 mV for Pt/C) and 92 mV for 10 and 200 mA cm-2 current density, respectively in 0.5 m H2 SO4 . It also exhibits remarkable stability of 15 000 accelerated degradation tests cycles (5000 for Pt/C) and exceptional durability of 500 h (10 mA cm-2 ) in acidic media. Pt3 Ge-(202) also displays low overpotential of 96 mV for 10 mA cm-2 current density in the alkaline medium, rationalizing its hydrogen production ability over a wide pH range required commercial operations. Long-term durability (>75 h in alkaline media) with the industrial level current density (>500 mA cm-2 ) has been demonstrated by utilizing the electrochemical flow reactor. The driving force behind this stupendous performance of Pt3 Ge-(202) has been envisaged by mapping the reaction mechanism, active sites, and charge-transfer kinetics via controlled electrochemical experiments, ex situ X-ray photoelectron spectroscopy, in situ infrared spectroscopy, and in situ X-ray absorption spectroscopy further corroborated by first principles calculations
Beschreibung:	Date Revised 27.07.2022 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202202294