Regulating Reversible Oxygen Electrocatalysis by Built‐in Electric Field of Heterojunction Electrocatalyst with Modified d‐Band

Small, Год журнала: 2023, Номер 19(15)

Опубликована: Янв. 5, 2023

Developing bifunctional catalysts for oxygen electrochemical reactions is essential high-performance energy devices. Here, a Mott-Schottky heterojunction composed of porous cobalt-nitrogen-carbon (Co-N-C) polyhedra containing abundant metal-phosphides reversible electrocatalysis reported. As demonstration, this catalyst shows excellent activity in the and thus delivers outstanding performance rechargeable zinc-air batteries (ZABs). The built-in electric field can promote electron transfer electrocatalysis. More importantly, an appropriate d-band center also endows intermediates with balanced adsorption/desorption capability, enhancing consequently improving ZABs. work demonstrates important design principle preparing efficient multifunctional conversion technologies.

Язык: Английский

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Parsing the basic principles to build efficient heterostructures toward electrocatalysis

Inorganic Chemistry Frontiers, Год журнала: 2023, Номер 10(8), С. 2220 - 2225

Опубликована: Янв. 1, 2023

This Chemistry Frontiers article systematically parses the inherent principles of universal component selection strategies, catalytic mechanisms, and structure–activity relationships for novel heterostructural electrocatalysts.

Язык: Английский

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Electrocatalysts Design Guided by Active Intermediates of Hydrogen Evolution Reaction

Advanced Energy Materials, Год журнала: 2023, Номер 13(43)

Опубликована: Окт. 6, 2023

Abstract Hydrogen production from water electrolysis plays an important role for the development of hydrogen‐based energy sources. Developing efficient electrocatalysts is crucial accelerating reaction kinetics and achieving large‐scale electrolysis. Despite significant advancements in hydrogen evolution (HER) achieved over past few decades, there remains a lack comprehensive discussion on in‐depth mechanism enhanced activity, particularly with regard to active intermediates. Recently, state‐of‐the‐art characterization methods theoretical computation, optimizing interaction between intermediates corresponding sites has been demonstrated as effective strategy enhance intrinsic catalytic activity. Herein, recent advances design guided by HER are presented. Emphasis focused key that determine activity strategies tune Finally, outlook future challenges perspectives based given.

Язык: Английский

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Asymmetric Bond Delta‐Polarization at the Interfacial Se─Ru─O Bridge for Efficient pH‐Robust Water Electrolysis

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 10, 2024

Abstract The rationalization of pH‐robust catalysis is highly desired but challengeable for overall water electrolysis (WE). It requests a metal active site that can make an efficient adaption with both cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). Herein, RuO 2‐x /RuSe 2 heterostructure electrocatalyst profiled interfacial Se─Ru─O bridge the splitting studies. An asymmetric bond delta‐polarization (Δp) found at bridge, including Δp > 0 Ru─O part < Ru─Se side by experiment calculation results. enlarged polarizability (Δp 0) in principle trigger lattice mediated (LOM) pathway OER; meanwhile, reduced benefit HER due to strengthened d‐p band hybridization. Resultantly, deliver ultralow overpotentials 25/10 mV Pt‐beyond 210/255 OER 10 mA cm −2 acidic/alkaline media, respectively. In especial, acidic WE be stably operated 200 h low cell voltage 1.478 V . This research clarifies polarization as criterion rational design catalysts.

Язык: Английский

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Fabrication of highly efficient Rh-doped cobalt–nickel-layered double hydroxide/MXene-based electrocatalyst with rich oxygen vacancies for hydrogen evolution

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 640, С. 338 - 347

Опубликована: Фев. 27, 2023

Язык: Английский

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