Ultradispersed IrxNi clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes
TLDR
In this paper, a rapid and facile synthetic route to obtain IrxNi/C clusters via polyol reduction was reported, which showed excellent activity for the oxygen evolution reaction and hydrogen evolution reaction (HER) in acidic electrolytes.Abstract:
Design and synthesis of electrocatalysts with high activity and low cost is an important challenge for water splitting. We report a rapid and facile synthetic route to obtain IrxNi clusters via polyol reduction. The IrxNi clusters show excellent activity for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic electrolytes. The optimized Ir2Ni/C clusters exhibit an electrochemical active area of 18.27 mF cm−2, with the overpotential of OER being 292 mV and HER being 30 mV at 10 mA cm−2, respectively. In addition, the Ir2Ni/C used as the cathode and anode for the H-type hydrolysis tank only needs 1.597 V cell voltages. The excellent electrocatalytic performance is mainly attributed to the synergistic effect between the metals and the ultra-fine particle size. This study provides a novel strategy that has a broad application for water splitting.read more
Citations
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Journal ArticleDOI
Advances in the Electrocatalytic Hydrogen Evolution Reaction by Metal Nanoclusters-based Materials.
TL;DR: In this article , the activity-enhancing approaches of metal nanoclusters (MNCs) applied in HER electrocatalysis are mainly summarized, and the recent progress in MNCs classified with different stabilization strategies, that is, the freestanding MNC, MNC with organic, metal and carbon supports, are introduced.
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Catalytic activity, thermal stability and structural evolution of PdCu single-atom alloy catalysts: the effects of size and morphology
TL;DR: In this article , the catalytic properties and thermal stability of PdCu SAAs with a crown-jewel (CJ) structure are studied by density functional theory (DFT) calculations and the molecular dynamics (MD) simulation method.
Journal ArticleDOI
Controllable Construction of IrCo Nanoclusters and the Performance for Water Electrolysis
TL;DR: In this article , a polyol reduction method was proposed to obtain IrxCo/C clusters by polyoline reduction, which can accelerate proton transfer and reduce costs while improving catalytic activity.
Journal ArticleDOI
Rare-earth modified platinum-based electrocatalysts incorporating anodic glycerol oxidation reactions while promoting cathodic hydrogen evolution reactions
TL;DR: In this article , an energy efficient Pt3Ce/C catalyst for the simultaneous precipitation of hydrogen from glycerol oxidation was presented, which showed better performance in GOR and HER compared to commercially available Pt/C electrocatalyst.
Journal ArticleDOI
Ultralow-iridium content NiIr alloy derivative nanochain arrays as bifunctional electrocatalysts for overall water splitting
Zhengyang Cai,Ping Wang,Xiang Min Zhao,Xiuming Bu,Jiajia Zhang,Yuhao Chen,Jingcheng Xu,Ya Yan,Aiying Chen,Xian-Ying Wang +9 more
TL;DR: In this article , the authors reported the controlled synthesis of nickel-iridium alloy derivative nanochain array electrodes (NiIrx NCs) with fully exposed active sites that facilitated mass transfer for efficient OWS.
References
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TL;DR: First-principles calculations reveal a ligand effect, induced by alloying Ir with 3d transition metals, can weaken the adsorption energy of oxygen intermediates, which is the key to realizing much-enhanced OER activity.
Journal ArticleDOI
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A unique oxygen ligand environment facilitates water oxidation in hole-doped IrNiOx core–shell electrocatalysts
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TL;DR: In this paper, the local geometric ligand environment and electronic metal states of oxygen-coordinated iridium centres in nickel-leached IrNi@IrOx metal oxide core-shell nanoparticles under catalytic oxygen evolution conditions were investigated.