Journal ArticleDOI
Iridium-Based Multimetallic Porous Hollow Nanocrystals for Efficient Overall-Water-Splitting Catalysis
Jianrui Feng,Fan Lv,Weiyu Zhang,Peihao Li,Kai Wang,Chao Yang,Bin Wang,Yong Yang,Jinhui Zhou,Fei Lin,Gui-Chang Wang,Shaojun Guo +11 more
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TLDR
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.Abstract:
The development of active and durable bifunctional electrocatalysts for overall water splitting is mandatory for renewable energy conversion. This study reports a general method for controllable synthesis of a class of IrM (M = Co, Ni, CoNi) multimetallic porous hollow nanocrystals (PHNCs), through etching Ir-based, multimetallic, solid nanocrystals using Fe3+ ions, as catalysts for boosting overall water splitting. The Ir-based multimetallic PHNCs show transition-metal-dependent bifunctional electrocatalytic activities for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in acidic electrolyte, with IrCo and IrCoNi PHNCs being the best for HER and OER, respectively. 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. The IrCoNi PHNCs are highly efficient in overall-water-splitting catalysis by showing a low cell voltage of only 1.56 V at a current density of 2 mA cm-2 , and only 8 mV of polarization-curve shift after a 1000-cycle durability test in 0.5 m H2 SO4 solution. This work highlights a potentially powerful strategy toward the general synthesis of novel, multimetallic, PHNCs as highly active and durable bifunctional electrocatalysts for high-performance electrochemical overall-water-splitting devices.read more
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A review on fundamentals for designing oxygen evolution electrocatalysts
Jiajia Song,Jiajia Song,Chao Wei,Zhen-Feng Huang,Chuntai Liu,Lin Zeng,Xin Wang,Zhichuan J. Xu +7 more
TL;DR: This article summarized the recent progress in understanding OER mechanisms, which include the conventional adsorbate evolution mechanism (AEM) and lattice-oxygen-mediated mechanism (LOM) from both theoretical and experimental aspects, and introduced strategies to reduce overpotential.
Journal ArticleDOI
Robust noble metal-based electrocatalysts for oxygen evolution reaction
TL;DR: This tutorial review covered the recent progress in the composition and structure optimization of NMEs for OER including Ir- and Ru-based oxides and alloys, and noble-metals beyond Ir and Ru with a variety of morphologies.
Journal ArticleDOI
Recent Advances on Water-Splitting Electrocatalysis Mediated by Noble-Metal-Based Nanostructured Materials
Yingjie Li,Yingjun Sun,Yingjun Sun,Yingnan Qin,Yingnan Qin,Weiyu Zhang,Lei Wang,Mingchuan Luo,Huai Yang,Shaojun Guo +9 more
Journal ArticleDOI
Advanced Electrocatalysts with Single-Metal-Atom Active Sites.
Yuxuan Wang,Hongyang Su,Yanghua He,Ligui Li,Shangqian Zhu,Hao Shen,Pengfei Xie,Xianbiao Fu,Guangye Zhou,Chen Feng,Dengke Zhao,Fei Xiao,Xiaojing Zhu,Yachao Zeng,Minhua Shao,Shaowei Chen,Gang Wu,Jie Zeng,Chao Wang +18 more
TL;DR: This review aims to provide a comprehensive summary on the recent development of single-atom electrocatalysts for various energy-conversion reactions using state-of-the-art microscopic and spectroscopic techniques.
Journal Article
Molecular insight in structure and activity of highly efficient, low-Ir Ir-Ni oxide catalysts for electrochemical water splitting (OER)
Tobias Reier,Zarina Pawolek,Serhiy Cherevko,Michael Bruns,Travis Jones,Detre Teschner,Sören Selve,Arno Bergmann,Hong Nhan Nong,Robert Schlögl,Karl Johann Jakob Mayrhofer,Peter Strasser +11 more
TL;DR: This study highlights a novel, highly active oxygen evolution catalyst and provides novel important insights into the structure and performance of bimetallic oxide OER electrocatalysts in corrosive acidic environments.
References
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Journal ArticleDOI
Benchmarking Heterogeneous Electrocatalysts for the Oxygen Evolution Reaction
TL;DR: In this paper, the authors report a protocol for evaluating the activity, stability, and Faradaic efficiency of electrodeposited oxygen-evolving electrocatalysts for water oxidation.
Journal ArticleDOI
Noble metal-free hydrogen evolution catalysts for water splitting
Xiaoxin Zou,Yu Zhang +1 more
TL;DR: This review highlights the recent research efforts toward the synthesis of noble metal-free electrocatalysts, especially at the nanoscale, and their catalytic properties for the hydrogen evolution reaction (HER), and summarizes some important examples showing that non-Pt HER electrocatsalysts could serve as efficient cocatalysts for promoting direct solar-to-hydrogen conversion in both photochemical and photoelectrochemical water splitting systems, when combined with suitable semiconductor photocatalyst.
Journal ArticleDOI
Design of electrocatalysts for oxygen- and hydrogen-involving energy conversion reactions
TL;DR: The emphasis of this review is on the origin of the electrocatalytic activity of nanostructured catalysts toward a series of key clean energy conversion reactions by correlating the apparent electrode performance with their intrinsic electrochemical properties.
Journal ArticleDOI
Benchmarking Hydrogen Evolving Reaction and Oxygen Evolving Reaction Electrocatalysts for Solar Water Splitting Devices
Charles C. L. McCrory,Suho Jung,Ivonne M. Ferrer,Shawn Chatman,Jonas C. Peters,Thomas F. Jaramillo +5 more
TL;DR: A standard protocol is used as a primary screen for evaluating the activity, short-term (2 h) stability, and electrochemically active surface area (ECSA) of 18 and 26 electrocatalysts for the hydrogen evolution reaction (HER and OER) under conditions relevant to an integrated solar water-splitting device in aqueous acidic or alkaline solution.
Journal ArticleDOI
Highly Crystalline Multimetallic Nanoframes with Three-Dimensional Electrocatalytic Surfaces
Chen Chen,Yijin Kang,Ziyang Huo,Ziyang Huo,Zhongwei Zhu,Zhongwei Zhu,Wenyu Huang,Wenyu Huang,Huolin L. Xin,Joshua Snyder,Dongguo Li,Jeffrey A. Herron,Manos Mavrikakis,Miaofang Chi,Karren L. More,Yadong Li,Nenad M. Markovic,Gabor A. Somorjai,Gabor A. Somorjai,Peidong Yang,Vojislav R. Stamenkovic +20 more
TL;DR: A highly active and durable class of electrocatalysts is synthesized by exploiting the structural evolution of platinum-nickel (Pt-Ni) bimetallic nanocrystals by exploitingThe starting material, crystalline PtNi3 polyhedra, transforms in solution by interior erosion into Pt3Ni nanoframes with surfaces that offer three-dimensional molecular accessibility.