Pd–PdO Nanodomains on Amorphous Ru Metallene Oxide for High‐Performance Multifunctional Electrocatalysis

Autor: Viet‐Hung Do, P Prabhu, Vishal Jose, Takefumi Yoshida, Yingtang Zhou, Hiroko Miwa, Takuma Kaneko, Tomoya Uruga, Yasuhiro Iwasawa, Jong‐Min Lee
Přispěvatelé: Interdisciplinary Graduate School (IGS), School of Chemistry, Chemical Engineering and Biotechnology, Energy Research Institute @ NTU (ERI@N)
Rok vydání: 2023
Předmět:
Zdroj: Advanced Materials. 35:2208860
ISSN: 1521-4095
0935-9648
Popis: Developing highly efficient multifunctional electrocatalysts is crucial for future sustainable energy pursuits, but remains a great challenge. Herein, a facile synthetic strategy is used to confine atomically thin Pd-PdO nanodomains to amorphous Ru metallene oxide (RuO2 ). The as-synthesized electrocatalyst (Pd2 RuOx-0.5 h) exhibits excellent catalytic activity toward the pH-universal hydrogen evolution reaction (η10 = 14 mV in 1 m KOH, η10 = 12 mV in 0.5 m H2 SO4 , and η10 = 22 mV in 1 m PBS), alkaline oxygen evolution reaction (η10 = 225 mV), and overall water splitting (E10 = 1.49 V) with high mass activity and operational stability. Further reduction endows the material (Pd2 RuOx-2 h) with a promising alkaline oxygen reduction activity, evidenced by high halfway potential, four-electron selectivity, and excellent poison tolerance. The enhanced catalytic activity is attributed to the rational integration of favorable nanostructures, including 1) the atomically thin nanosheet morphology, 2) the coexisting amorphous and defective crystalline phases, and 3) the multi-component heterostructural features. These structural factors effectively regulate the material's electronic configuration and the adsorption of intermediates at the active sites for favorable reaction energetics. Ministry of Education (MOE) This work was financially supported by the AcRF Tier 1 (grant RG105/19) provided by the Ministry of Education in Singapore and the Foundation of State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering (grant no. 2022-K31).
Databáze: OpenAIRE
Externí odkaz: