scholarly journals Bismuth Substituted Strontium Cobalt Perovskites for Catalyzing Oxygen Evolution

2019 ◽  
Author(s):  
Denis Kuznetsov ◽  
Jiayu Peng ◽  
Livia Giordano ◽  
Yuriy Román-Leshkov ◽  
Yang Shao-Horn
Keyword(s):  
Fermi Level ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Rational Design ◽  
High Stability ◽  
Inductive Effect ◽  
Specific Activity ◽  
Band Center ◽  
Highly Active ◽  
A Site

In this study, we employ the strategy of substitution with more electronegative/acidic A-site ions in the cobalt perovskites to alter O 2p-band center, surface hydroxide affinity, and oxygen evolution reaction (OER) activity and stability in the basic electrolyte. Galvanostatically charged Bi<sub>0.2</sub>Sr<sub>0.8</sub>CoO<sub>3-δ</sub> (δ close to zero) was shown to exhibit record OER specific activity exceeding not only La<sub>x</sub>Sr<sub>1-x</sub>CoO<sub>3-δ</sub> but also charged SrCoO<sub>3-δ</sub> (δ close to zero), one of the most active oxide OER catalysts reported so far. The enhanced OER activity of charged Bi<sub>0.2</sub>Sr<sub>0.8</sub>CoO<sub>3-δ</sub> can be attributed to greater hydroxide affinity facilitating the deprotonation of surface bound intermediates due to the presence of strong Lewis acidic A-site Bi<sup>3+</sup> ions, while the high stability can result from lowered O 2p-band center relative to the Fermi level. This work provides a novel example in the rational design of highly active oxide catalysts for OER by leveraging the inductive effect.

scholarly journals Bismuth Substituted Strontium Cobalt Perovskites for Catalyzing Oxygen Evolution

2019 ◽  
Author(s):  
Denis Kuznetsov ◽  
Jiayu Peng ◽  
Livia Giordano ◽  
Yuriy Román-Leshkov ◽  
Yang Shao-Horn
Keyword(s):  
Fermi Level ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Rational Design ◽  
High Stability ◽  
Inductive Effect ◽  
Specific Activity ◽  
Band Center ◽  
Highly Active ◽  
A Site

In this study, we employ the strategy of substitution with more electronegative/acidic A-site ions in the cobalt perovskites to alter O 2p-band center, surface hydroxide affinity, and oxygen evolution reaction (OER) activity and stability in the basic electrolyte. Galvanostatically charged Bi<sub>0.2</sub>Sr<sub>0.8</sub>CoO<sub>3-δ</sub> (δ close to zero) was shown to exhibit record OER specific activity exceeding not only La<sub>x</sub>Sr<sub>1-x</sub>CoO<sub>3-δ</sub> but also charged SrCoO<sub>3-δ</sub> (δ close to zero), one of the most active oxide OER catalysts reported so far. The enhanced OER activity of charged Bi<sub>0.2</sub>Sr<sub>0.8</sub>CoO<sub>3-δ</sub> can be attributed to greater hydroxide affinity facilitating the deprotonation of surface bound intermediates due to the presence of strong Lewis acidic A-site Bi<sup>3+</sup> ions, while the high stability can result from lowered O 2p-band center relative to the Fermi level. This work provides a novel example in the rational design of highly active oxide catalysts for OER by leveraging the inductive effect.

scholarly journals 2D Layered Double Hydroxide Nanosheets and Their Derivatives Toward Efficient Oxygen Evolution Reaction

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Xueyi Lu ◽  
Hairong Xue ◽  
Hao Gong ◽  
Mingjun Bai ◽  
Daiming Tang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Rational Design ◽  
Direct Synthesis ◽  
Future Research ◽  
Highly Active ◽  
Host Metal ◽  
Conductive Substrates ◽  
Double Hydroxide ◽  
Double Hydroxides

AbstractLayered double hydroxides (LDHs) have attracted tremendous research interest in widely spreading applications. Most notably, transition-metal-bearing LDHs are expected to serve as highly active electrocatalysts for oxygen evolution reaction (OER) due to their layered structure combined with versatile compositions. Furthermore, reducing the thickness of platelet LDH crystals to nanometer or even molecular scale via cleavage or delamination provides an important clue to enhance the activity. In this review, recent progresses on rational design of LDH nanosheets are reviewed, including direct synthesis via traditional coprecipitation, homogeneous precipitation, and newly developed topochemical oxidation as well as chemical exfoliation of parent LDH crystals. In addition, diverse strategies are introduced to modulate their electrochemical activity by tuning the composition of host metal cations and intercalated counter-anions, and incorporating dopants, cavities, and single atoms. In particular, hybridizing LDHs with conductive components or in situ growing them on conductive substrates to produce freestanding electrodes can further enhance their intrinsic catalytic activity. A brief discussion on future research directions and prospects is also summarized.

scholarly journals A-Site Cation-Ordering Layered Perovskite EuBa0.5Sr0.5Co2–xFexO5+δ as Highly Active and Durable Electrocatalysts for Oxygen Evolution Reaction

ACS Omega ◽  
2020 ◽  
Vol 5 (21) ◽  
pp. 12501-12515 ◽  
Author(s):  
Xiu Wang ◽  
Yingnan Dou ◽  
Ying Xie ◽  
Jingping Wang ◽  
Tian Xia ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Layered Perovskite ◽  
Cation Ordering ◽  
Highly Active ◽  
A Site

Controllable growth of graphdiyne layered nanosheets for high-performance water oxidation

2021 ◽  
Author(s):  
Shuya Zhao ◽  
Yurui Xue ◽  
Zhongqiang Wang ◽  
Zhiqiang Zheng ◽  
Xiaoyu Luan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Low Cost ◽  
Highly Active ◽  
Controllable Growth

Developing highly active, stable and low-cost electrocatalysts capable of an efficient oxygen evolution reaction (OER) is urgent and challenging.

High-performance anion exchange membrane alkaline seawater electrolysis

2021 ◽  
Author(s):  
Yoo Sei Park ◽  
Jooyoung Lee ◽  
Myeong-Je Jang ◽  
Juchan Yang ◽  
Jae Hoon Jeong ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Anion Exchange Membrane ◽  
Hydrogen Energy ◽  
Highly Active ◽  
Production Of Hydrogen ◽  
Exchange Membrane ◽  
Seawater Electrolysis

Seawater electrolysis is a promising technology for the production of hydrogen energy and seawater desalination. To produce hydrogen energy through seawater electrolysis, highly active electrocatalysts for the oxygen evolution reaction...

Selenic Acid Etching Assisted Vacancy Engineering for Designing Highly Active Electrocatalysts toward the Oxygen Evolution Reaction

2021 ◽  
Vol 33 (14) ◽  
pp. 2007523
Author(s):  
Lin Zhang ◽  
Chengjie Lu ◽  
Fei Ye ◽  
Ruilvjing Pang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acid Etching ◽  
Selenic Acid ◽  
Highly Active

Cathodic Corrosion Activated Fe-based Nanoglass as Highly-Active and -Stable Oxygen Evolution Catalyst for Water Splitting

2021 ◽  
Author(s):  
Kaiyao Wu ◽  
Fei Chu ◽  
Yuying Meng ◽  
Kaveh Edalati ◽  
Qingsheng Gao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Amorphous Alloys ◽  
Precious Metal ◽  
Active Sites ◽  
Metal Free ◽  
Highly Active ◽  
Stable Oxygen ◽  
Surface Active

Transition metal-based amorphous alloys have attracted increasing attention as precious-metal-free electrocatalysts for oxygen evolution reaction (OER) of water splitting due to their high macro-conductivity and abundant surface active sites. However,...

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