A high-performance oxygen evolution catalyst in neutral-pH for sunlight-driven CO2 reduction

Zhou, Li; Ling, Chen; Zhou, Hui; Wang, Xiang; Liao, Joseph C.; Reddy, Gunugunuri K.; Deng, Liangzi; Peck, Torin C.; Zhang, Ruigang; Whittingham, M. Stanley; Wang, Chongmin; Chu, C. W.; Yao, Yan; Jia, Hongfei

doi:10.1038/s41467-019-12009-8

Cited by 69 publications

(48 citation statements)

References 49 publications

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“…b) HR‐TEM images of Sr 2 AlCoO 5 for pristine sample and for sample after 100 cyclic voltammetry scans from 1.0 to 1.7 V. Reproduced with permission. [ 91 ] Copyright 2019, Nature Publishing Group. c) AFM images of SL‐Ni(OH) 2 at the open‐circuit voltage and then after the chronopotentiometry measurement (for 500 s) at 1.41, 1.46, and 1.61 V versus RHE.…”

Section: Reconstruction Phenomenonmentioning

confidence: 99%

“…Jia's group investigated two Brownmillerite oxides, Sr 2 GaCoO 5 and Sr 2 AlCoO 5 as OER electrocatalysts under neutral media and observed the reconstruction phenomenon in Sr 2 AlCoO 5 by means of TEM and other techniques. [ 91 ] High‐resolution TEM (HR‐TEM) images (Figure 4b) showcased the well‐crystallized surface of pristine Sr 2 AlCoO 5 appeared an amorphous layer after 100 CV cycles. In‐depth study disclosed that the above reconstruction of Sr 2 AlCoO 5 can be ascribed to Al‐leaching induced amorphization.…”

Section: Reconstruction Phenomenonmentioning

confidence: 99%

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Reconstructed Water Oxidation Electrocatalysts: The Impact of Surface Dynamics on Intrinsic Activities

Selvam

Xia

et al. 2020

Adv Funct Materials

208

128

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Electroreduction of small molecules such as H2O, CO2, and N2 for producing clean fuels or valuable chemicals provides a sustainable approach to meet the increasing global energy demands and to alleviate the concern on climate change resulting from fossil fuel consumption. On the path to implement this purpose, however, several scientific hurdles remain, one of which is the low energy efficiency due to the sluggish kinetics of the paired oxygen evolution reaction (OER). In response, it is highly desirable to synthesize high‐performance and cost‐effective OER electrocatalysts. Recent advances have witnessed surface reconstruction engineering as a salient tool to significantly improve the catalytic performance of OER electrocatalysts. In this review, recent progress on the reconstructed OER electrocatalysts and future opportunities are discussed. A brief introduction of the fundamentals of OER and the experimental approaches for generating and characterizing the reconstructed active sites in OER nanocatalysts are given first, followed by an expanded discussion of recent advances on the reconstructed OER electrocatalysts with improved activities, with a particular emphasis on understanding the correlation between surface dynamics and activities. Finally, a prospect for clean future energy communities harnessing surface reconstruction‐promoted electrochemical water oxidation will be provided.

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Section: Reconstruction Phenomenonmentioning

confidence: 99%

Section: Reconstruction Phenomenonmentioning

confidence: 99%

Reconstructed Water Oxidation Electrocatalysts: The Impact of Surface Dynamics on Intrinsic Activities

Selvam

Xia

et al. 2020

Adv Funct Materials

208

128

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“…Thus, we were able to encapsulate CoTMPP molecule inside ZIF‐8 MOF and prepare an efficient catalyst that can perform electrocatalytic OER in a wide pH range and also can perform electrocatalytic ORR in neutral pH (Section S10 in the Supporting Information). Although, in last few years, handful of highly efficient OER catalysts have been reported by researchers, [58–64] the catalytic OER efficiency of CTMZ‐8 can be compared with the best MOF based OER catalysts that can perform OER in neutral pH (Section S10 in the Supporting Information).…”

Section: Mechanistic and Kinetic Analysismentioning

confidence: 99%

ZIF‐8 MOF Encapsulated Co‐porphyrin, an Efficient Electrocatalyst for Water Oxidation in a Wide pH Range: Works Better at Neutral pH

2020

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Water oxidation (WO) is the most important and thermodynamically challenging process associated with water splitting. Several metal porphyrins are reported to perform catalytic WO through the central metal but [5,10,15,20‐tetrakis(4‐methoxyphenyl)porphyrinato]cobalt(II) (abbreviated as CoTMPP), which is well‐known for its ability to perform oxygen reduction reaction (ORR), lacks the capacity to perform WO. Here we have successfully activated CoTMPP towards electrochemical WO by means of its in situ encapsulation inside the cavity of a versatile metal organic framework (MOF), known as zeolitic imidazolate framework‐8 (ZIF‐8). The composite, thus prepared i. e., CoTMPP@ZIF‐8 (abbreviated as CTMZ‐8), behaves as a heterogeneous, robust, and efficient electrocatalyst for oxygen evolution reaction (OER) at a wide pH range (from acidic to neutral). Required overpotential (η) of 387.4 mV (neutral pH) and 562.7 mV (pH 2) and high turnover frequency (TOF) of 2.7 s−1 (at neutral pH) make this composite (CTMZ‐8) an efficient electrocatalyst for WO. To the best of our knowledge, this is the first report of electrocatalytic WO by CoTMPP.

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“…Electrocatalytic oxygen evolution reaction (OER) is a critical component of various energy-conversion systems, such as water splitting and CO 2 reduction, by providing electrons and protons needed for these processes [1][2][3][4][5]. However, the sluggish kinetics of OER largely limits the energy conversion efficiency of such devices [6,7].…”

Section: Introductionmentioning

confidence: 99%

Boron-doped amorphous iridium oxide with ultrahigh mass activity for acidic oxygen evolution reaction

Cheng

Shao

et al. 2021

Sci. China Mater.

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Oxygen evolution reaction (OER), as the primary anodic reaction, plays a critical role in many electrochemical energy conversion processes. As the state-of-the-art OER catalysts, iridium-based materials are largely hindered from practical applications mainly due to the extreme scarcity of iridium. Here we demonstrate the successful fabrication of boron-doped amorphous iridium oxide (IrO x -B) via a facile boric acid-assisted method, which realizes an ultrahigh OER mass activity of 2779 A g −1Ir at 300 mV overpotential, representing one of the best acidic OER catalysts reported so far. It is found that boric acid can not only facilitate the exposure of Ir, but also dope the amorphous IrO x with a form of metaborate, which could further modify the electronic and local ligand structure of Ir for the improved intrinsic activity. Interestingly, the reported strategy is universal that can be applied to improve other metal oxide OER catalysts, highlighting a versatile strategy for creating high-performance electrocatalysts with ultrahigh mass activity for OER and beyond.

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A high-performance oxygen evolution catalyst in neutral-pH for sunlight-driven CO2 reduction

Cited by 69 publications

References 49 publications

Reconstructed Water Oxidation Electrocatalysts: The Impact of Surface Dynamics on Intrinsic Activities

Reconstructed Water Oxidation Electrocatalysts: The Impact of Surface Dynamics on Intrinsic Activities

ZIF‐8 MOF Encapsulated Co‐porphyrin, an Efficient Electrocatalyst for Water Oxidation in a Wide pH Range: Works Better at Neutral pH

Boron-doped amorphous iridium oxide with ultrahigh mass activity for acidic oxygen evolution reaction

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