An efficient and durable trifunctional electrocatalyst for zinc-air batteries driven overall water splitting

被引：137

作者：

Logeshwaran, Natarajan ^{[1
]}

Ramakrishnan, Shanmugam ^{[1
]}

Chandrasekaran, Selvaraj Selva ^{[2
,3
]}

Vinothkannan, Mohanraj ^{[4
]}

Kim, Ae Rhan ^{[1
,5
]}

Sengodan, Sivaprakash ^{[6
]}

Velusamy, Dhinesh Babu ^{[7
]}

Varadhan, Purushothaman ^{[8
]}

He, Jr-Hau ^{[9
]}

Yoo, Dong Jin ^{[1
,4
,5
]}

机构：

[1] Jeonbuk Natl Univ, Grad Sch, Dept Energy Storage Convers Engn, Jeonju 54896, Jeollabuk Do, South Korea

[2] Univ Grenoble Alpes, Dept Phys, IriG, F-38000 Grenoble, France

[3] CEA, F-38000 Grenoble, France

[4] Jeonbuk Natl Univ, R&D Educ Ctr Whole Life Cycle R&D Fuel Cell Syst, Jeonju 54896, Jeollabuk Do, South Korea

[5] Jeonbuk Natl Univ, Hydrogen & Fuel Cell Res Ctr, Grad Sch, Dept Life Sci, Jeonju 54896, Jeollabuk Do, South Korea

[6] Imperial Coll London, Dept Mat, London SW7 2AZ, England

[7] Univ Cambridge, Cambridge Graphene Ctr, 9 JJ Thomson Ave, Cambridge CB3 0FA, England

[8] King Abdullah Univ Sci & Technol KAUST, Comp Elect & Math Sci & Engn CEMSE Div, Thuwal 239556900, Saudi Arabia

[9] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 297卷

基金：

新加坡国家研究基金会;

关键词：

Pt@CoS2-NrGO; Trifunctional electrocatalyst; Density functional theory; Zinc-air battery; Overall water splitting; ENHANCED CATALYTIC-ACTIVITY; HYDROGEN EVOLUTION; OXYGEN REDUCTION; BIFUNCTIONAL ELECTROCATALYST; HIGH-PERFORMANCE; NAFION MATRIX; NICKEL FOAM; GRAPHENE; NANOPARTICLES; HETEROSTRUCTURES;

D O I：

10.1016/j.apcatb.2021.120405

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Constructing more active and durable trifunctional electrocatalysts is key for boosting overall water splitting and metal-air battery efficiency. Herein, we developed a trifunctional electrocatalyst of ultrafine Pt nanoparticles anchored on CoS2-N-doped reduced graphene oxide (Pt@CoS2-NrGO). Owing to its more Pt active sites with rapid ion/electron transport ability, the Pt@CoS2-NrGO shows excellent trifunctional activities towards HER (r10 = 39 mV), OER (r10 = 235 mV) ORR (E1/2 = 0.85 V vs. RHE) and water splitting device of Pt@CoS2-NrGO|| Pt@CoS2-NrGO achieved cell voltage of 1.48 V at 10 mA cm-2, which is better than Pt-C||RuO2. Finally, we employed Pt@CoS2-NrGO as air cathode for zinc-air battery to display a power density of 114 mW cm-2 and durability of 55 h, outperforming than Pt-C + RuO2 based zinc-air batteries. For practical aspects, Pt@CoS2NrGO based zinc-air batteries were connected to overall water splitting device to produce H2 and O2 gases for hydrogen fuel cell.

引用

页数：12

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