ORCID Profile
0000-0002-6800-0467
Current Organisations
City University of Hong Kong
,
Hong Kong University of Science and Technology
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Publisher: Springer Science and Business Media LLC
Date: 05-09-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC04895A
Abstract: Layered PrBaMn 2 O 5+δ catalysts, facilely prepared by annealing pristine Pr 0.5 Ba 0.5 MnO 3−δ in H 2 , exhibit remarkably enhanced oxygen reduction/evolution reaction activities.
Publisher: American Chemical Society (ACS)
Date: 11-04-2018
Publisher: American Chemical Society (ACS)
Date: 11-12-2017
Publisher: Wiley
Date: 11-03-2022
Abstract: Combining noble metals with nonnoble metals is an attractive strategy to balance the activity and cost of electrocatalysts. However, a guiding principle for selecting suitable nonnoble metals is still lacking. Herein, a thorough mechanistic study on the platform oxygen evolution reaction (OER) electrocatalyst of Ir@Co 3 O 4 to deeply understand the synergy between Ir and Co 3 O 4 for the boosted OER has been carried out. It is demonstrated that the pseudocapacitive feature of Co 3 O 4 plays a key role in accumulating sufficient positive charge [ Q ], while the Ir sites are responsible for achieving a high reaction order (β), synergistically contributing to the high OER activity of Ir@Co 3 O 4 through the rate law equation. Specifically, Ir@Co 3 O 4 displays a low overpotential of 280 mV at 10 mA cm −2 with a small Ir loading of 1.4 wt%. Ir@Co 3 O 4 is further applied to Zn‐air batteries, which enables a low charging potential and thus alleviates the oxidative corrosion of the air electrode, leading to improved cycle stability of 210 h at 20 mA cm −2 . This work demonstrates that anchoring active noble metal sites (for high β) on pseudocapacitive supports (for high [ Q ]) is highly favorable to the OER process, providing a clear guidance for boosting the utilization of noble metals in electrocatalysis.
Publisher: Springer Science and Business Media LLC
Date: 09-2022
Publisher: Elsevier BV
Date: 05-2018
No related grants have been discovered for Jian WANG.