Oxygen reduction reaction electrocatalysts based on FeSn0.5 species embedded in hierarchical CN-graphene based supports
Enrico Negro, Angeloclaudio Nale, Keti Vezzu', Federico Bertasi, Gioele Pagot, Stefano Polizzi, Alberto Ansaldo, Mirko Prato, Francesco Bonaccorso, Iwona A. Rut… 展开作者
Enrico Negro, Angeloclaudio Nale, Keti Vezzu', Federico Bertasi, Gioele Pagot, Stefano Polizzi, Alberto Ansaldo, Mirko Prato, Francesco Bonaccorso, Iwona A. Rutkowska, Pawel J. Kulesza, Vito Di Noto
This work reports the synthesis, the physicochemical characterization and the electrochemical studies of new electrocatalysts (ECs) for the oxygen reduction reaction (ORR) that: (i) are based on a hierarchical graphene-based support; and (ii) do not comprise platinum. The active sites of the ECs consist of Fe and Sn species stabilized in 'coordination nests' of a carbon nitride (CN) matrix. The latter exhibits a rough, microporous morphology and acts as a 'shell' covering a graphene 'core'. This paper: (i) discusses the role played by Fe as the 'active metal' in this family of ECs; and (ii) examines in detail how the physicochemical properties and, correspondingly, the electrochemical performance are affected by a suitable activation procedure A meant to boost the ORR kinetics. The results lead to an improved fundamental understanding on the features of the active sites, including the impact of both A and the pH of the environment in their performance and ORR mechanism. These insights clarify the most desirable features to be included in high-performing ECs belonging to this family, paving the way to the synthesis of next-generation, efficient ECs for the ORR that do not comprise platinum.
Graphene-Supported Silver-Iron Carbon Nitride Derived from Thermal Decomposition of Silver Hexacyanoferrate as Effective Electrocatalyst for the Oxygen Reduction Reaction in Alkaline Media
Unravelling of the chemistry and the performance in the oxygen reduction reaction of carbon nitride-supported bimetallic electrocatalysts through X-ray photoelectron spectroscopy
Free-sustaining Three-dimensional S235 Steel-based Porous Electrocatalyst for Highly Efficient and Durable Oxygen Evolution
以S235钢为基体，采用一步表面改性的方法制备了一种新型的析氧反应催化剂（3D S235-P钢）。对标准碳锰钢进行表面磷化，从而形成具有高比表面积的独特3D互连纳米多孔表面，这有助于电催化引发的析氧反应。制备的3D S235-P钢在碱性条件下表现出较强的电催化OER活性，其过电位较低（η=326 mV，j=10 mA cm-2），Tafel斜率较小（68.7 mV dec-1）。此外，发现该催化剂在pH 13下在长期使用条件下用作析氧电极是稳定的，这由足够的电荷到氧的转化率（法拉第效率：在10 mA cm-2和5 mA cm-2下分别为82.11%和88.34%）证明。此外，结果表明，所选择的表面改性使S235钢成为OER电催化剂，其在中性pH条件下充分且稳定地工作。我们的研究表明，高催化活性可能源于OER过程中产生的Fe/（Mn）氢氧化物/氧代氢氧化物。因此，磷化处理不仅是优化标准碳锰钢的电催化性能的有效方法，而且还能够在能量转换领域开发低成本和丰富的钢。
Enhancing Oxygen Reduction Reaction on Pt-Based Electrocatalysts through Surface Decoration for Improved OH Reduction Equilibrium and Reduced H2O Adsorption
Multidimensional Design of Metal-Nitrogen-Carbon Electrocatalysts for Direct Propylene Epoxidation
Advanced Institute for Materials Research (WPI-AIMR), Tohoku University（东北大学先进材料研究所）；Graduate School of Engineering, Tohoku University（东北大学研究生院工学研究科）；School of Chemical and Biomolecular Engineering, The University of Sydney（悉尼大学化学与生物分子工程学院）
Spin State versus Potential of Zero Charge as Predictors of Density-Dependent Oxygen Reduction in M-N-C Electrocatalysts
Advanced Institute for Materials Research (WPI-AIMR), Tohoku University（东北大学先进物质研究所）；The Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University（东北大学前沿跨学科科学研究院）；School of Chemical and Biomolecular Engineering, The University of Sydney（悉尼大学化学与生物分子工程学院）；Sydney Analytical, Core Research Facilities, The University of Sydney（悉尼大学悉尼分析核心研究设施）
Leveraging Data Mining, Active Learning, and Domain Adaptation in a Multi-Stage, Machine Learning-Driven Approach for the Efficient Discovery of Advanced Acidic Oxygen Evolution Electrocatalysts
Pritzker School of Molecular Engineering, University of Chicago（芝加哥大学普利兹克分子工程学院）；Data Science Institute, University of Chicago（芝加哥大学数据科学研究所）；Argonne National Laboratory（阿贡国家实验室）；North China Electric Power University（华北电力大学）；Nanjing University（南京大学）；The Hong Kong University of Science and Technology（香港科技大学）；Department of Computer Science, University of Chicago（芝加哥大学计算机科学系）
Tunable structure-activity correlations of molybdenum dichalcogenides (MoX$_2$; X= S, Se, Te) electrocatalysts via hydrothermal methods: insight into optimizing the electrocatalytic performance for hydrogen generation
Nafion-induced reduction of manganese and its impact on the electrocatalytic properties of a highly active MnFeNi oxide for bifunctional oxygen conversion
Experimental and theoretical studies on the photodegradation of 2-ethylhexyl 4-methoxycinnamate in the presence of reactive oxygen and chlorine species
Studies on the formation of formaldehyde during 2-ethylhexyl 4-(dimethylamino)benzoate demethylation in the presence of reactive oxygen and chlorine species
University of Illinois（伊利诺伊大学）；Materials Research Laboratory, University of Illinois（伊利诺伊大学材料研究实验室）；Beckman Institute for Advanced Science and Technology, University of Illinois（伊利诺伊大学贝克曼先进科学技术研究所）
