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Bai M, Diao H, Mu X, Wang Z, Cao J, Li Y. Rewc-GNN Algorithm for the Property Prediction of Large-Scale Crystals. J Phys Chem A 2024; 128:6183-6189. [PMID: 39037404 DOI: 10.1021/acs.jpca.4c02516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
The space group of a crystal describes the symmetry and periodic arrangement of its structure. As the fundamental element in the structure, it plays a vital role in determining the physical and chemical properties of crystals. The investigation of crystal space group information allows for the prediction of material properties, thereby providing guidance for material design and synthesis to enhance their performance or functionality. Currently prevalent first-principles-based computational methods exhibit good accuracy, but they rely heavily on computing resources, greatly limiting the efficiency of material screening. In this paper, our study is oriented toward the prediction the spatial group of crystals, and an algorithm named Rewc, based on graph neural networks (GNNs) is proposed. This algorithm encodes all atoms and the interactions between atoms in the crystal as features by combining Floyd algorithm and k-hop message passing and employs multilayer convolutional networks to extract connections between k layers. This allows for the automatic learning of more representative atomic vector representations through iterations of feature information for each atom and its neighbors. Experimental results demonstrate that the Rewc framework exhibits reliable accuracy and good generalization capabilities in predicting the crystal structure compared to previous GNN methods.
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Affiliation(s)
- Minglei Bai
- School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China
| | - Haoxuan Diao
- School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xijiao Mu
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhong Wang
- School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jing Cao
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yuee Li
- School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China
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Han X, Mou T, Islam A, Kang S, Chang Q, Xie Z, Zhao X, Sasaki K, Rodriguez JA, Liu P, Chen JG. Theoretical Prediction and Experimental Verification of IrO x Supported on Titanium Nitride for Acidic Oxygen Evolution Reaction. J Am Chem Soc 2024. [PMID: 38859684 DOI: 10.1021/jacs.4c02936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Reducing iridium (Ir) catalyst loading for acidic oxygen evolution reaction (OER) is a critical strategy for large-scale hydrogen production via proton exchange membrane (PEM) water electrolysis. However, simultaneously achieving high activity, long-term stability, and reduced material cost remains challenging. To address this challenge, we develop a framework by combining density functional theory (DFT) prediction using model surfaces and proof-of-concept experimental verification using thin films and nanoparticles. DFT results predict that oxidized Ir monolayers over titanium nitride (IrOx/TiN) should display higher OER activity than IrOx while reducing Ir loading. This prediction is verified by depositing Ir monolayers over TiN thin films via physical vapor deposition. The promising thin film results are then extended to commercially viable powder IrOx/TiN catalysts, which demonstrate a lower overpotential and higher mass activity than commercial IrO2 and long-term stability of 250 h to maintain a current density of 10 mA cm-2. The superior OER performance of IrOx/TiN is further confirmed using a proton exchange membrane water electrolyzer (PEMWE), which shows a lower cell voltage than commercial IrO2 to achieve a current density of 1 A cm-2. Both DFT and in situ X-ray absorption spectroscopy reveal that the high OER performance of IrOx/TiN strongly depends on the IrOx-TiN interaction via direct Ir-Ti bonding. This study highlights the importance of close interaction between theoretical prediction based on mechanistic understanding and experimental verification based on thin film model catalysts to facilitate the development of more practical powder IrOx/TiN catalysts with high activity and stability for acidic OER.
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Affiliation(s)
- Xue Han
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Tianyou Mou
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Arephin Islam
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Sinwoo Kang
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Qiaowan Chang
- School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Zhenhua Xie
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Xueru Zhao
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kotaro Sasaki
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - José A Rodriguez
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ping Liu
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jingguang G Chen
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
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Gou Q, Liu J, Su H, Guo Y, Chen J, Zhao X, Pu X. Exploring an accurate machine learning model to quickly estimate stability of diverse energetic materials. iScience 2024; 27:109452. [PMID: 38523799 PMCID: PMC10960145 DOI: 10.1016/j.isci.2024.109452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/27/2024] [Accepted: 03/06/2024] [Indexed: 03/26/2024] Open
Abstract
High energy and low sensitivity have been the focus of developing new energetic materials (EMs). However, there has been a lack of a quick and accurate method for evaluating the stability of diverse EMs. Here, we develop a machine learning prediction model with high accuracy for bond dissociation energy (BDE) of EMs. A reliable and representative BDE dataset of EMs is constructed by collecting 778 experimental energetic compounds and quantum mechanics calculation. To sufficiently characterize the BDE of EMs, a hybrid feature representation is proposed by coupling the local target bond into the global structure characteristics. To alleviate the limitation of the low dataset, pairwise difference regression is utilized as a data augmentation with the advantage of reducing systematic errors and improving diversity. Benefiting from these improvements, the XGBoost model achieves the best prediction accuracy with R2 of 0.98 and MAE of 8.8 kJ mol-1, significantly outperforming competitive models.
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Affiliation(s)
- Qiaolin Gou
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jing Liu
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Haoming Su
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yanzhi Guo
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jiayi Chen
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xueyan Zhao
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
| | - Xuemei Pu
- College of Chemistry, Sichuan University, Chengdu 610064, China
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Wang L, Du R, Liang X, Zou Y, Zhao X, Chen H, Zou X. Optimizing Edge Active Sites via Intrinsic In-Plane Iridium Deficiency in Layered Iridium Oxides for Oxygen Evolution Electrocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312608. [PMID: 38195802 DOI: 10.1002/adma.202312608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/29/2023] [Indexed: 01/11/2024]
Abstract
Improving catalytic activity of surface iridium sites without compromising catalytic stability is the core task of designing more efficient electrocatalysts for oxygen evolution reaction (OER) in acid. This work presents phase transition of a bulk layered iridate Na2IrO3 in acid solution at room temperature, and subsequent exfoliation to produce 2D iridium oxide nanosheets with around 4 nm thickness. The nanosheets consist of OH-terminated, honeycomb-type layers of edge-sharing IrO6 octahedral framework with intrinsic in-plane iridium deficiency. The nanosheet material is among the most active Ir-based catalysts reported for acidic OER and gives an iridium mass activity improvement up to a factor of 16.5 over rutile IrO2 nanoparticles. The material also exhibits good catalytic and structural stability and retains the catalytic activity for more than 1300 h. The combined experimental and theoretical results demonstrate that edge Ir sites of the layer are active centers for OER, with structural hydroxyl groups participating in the catalytic cycle of OER via a non-traditional adsorbate evolution mechanism. The existence of intrinsic in-plane iridium deficiency is the key to building a unique local environment of edge active sites that have optimal surface oxygen adsorption properties and thereby high catalytic activity.
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Affiliation(s)
- Lina Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Ruofei Du
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Xiao Liang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Yongcun Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Xiao Zhao
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Hui Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
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