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chengxiang "cx" xiang

Principal Investigator

Email: cxx@caltech.edu

Dr. Xiang’s research interest includes:  design, modeling/simulation, and experimental demonstration of high-efficiency solar-fuel devices; opto-electronic-catalytic modeling of advanced micro/nanostructured photoelectrochemical systems; multi-ion transport modeling in solution and polymer electrolytes; investigation of fundamental energy-conversion/energy-storage properties of semiconductors and (photo)electrochemistry at semiconductor/liquid interfaces.

Dr. Xiang’s research in JCAP includes:  system modeling of CO2-reduction reaction (CO2RR) based solar-fuel devices; optoelectronic and ionic transport modeling of integrated photoelectrochemical assemblies; (photo)electrochemical coupling between oxygen-evolution reaction (OER) and CO2RR; and design, optimization, and implementation of advanced test-bed prototypes for CO2RR.

Selected Publications

Ho, A., Zhou, X., Han, L., Sullivan, I., Karp, C., Lewis, N., Xiang, C. Decoupling H2(g) and O2(g) Production in Water Splitting by a Solar-Driven V3+/2+(aq,H2SO4)|KOH(aq) Cell. ACS Energy Letters, 4, 968-976, DOI: 10.1021/acsenergylett.9b00278 (2019).

Xaing, C., Walczak, K., Haber, J., Jones, R., Beeman, J., Guevarra, D., Karp, C., Liu, R., Shaner, M., Sun, K., West, W., Zhou, L. Chapter 11 Prototyping Development of Integrated Solar-driven Water-splitting Cells. Book Section in Integrated Solar Fuel Generators, The Royal Society of Chemistry, 387-453, DOI: 10.1039/9781788010313-00387 (2018).

Han, L., Zhou, W., Xiang, C. High Rate Electrochemical Reduction of Carbon Monoxide to Ethylene using Cu-Nanoparticle-Based Gas Diffusion Electrodes. ACS Energy Letters, DOI: 10.1021/acsenergylett.8b00164 (2018).

Hashiba, H., Weng, L.-C., Chen, Y., Sate, H. K., Yotsuhashi, S., Xiang, C., Weber, A. Effects of Electrolyte Buffer Capacity on Surface Reactant Species and the Reaction Rate of CO2 in Electrochemical CO2 Reduction. DOI: 10.1021/acs.jpcc.7b11316 (2018).

Higgins, D., Hahn, C., Xiang, C., Jaramillo, T., Weber, A. Gas-Diffusion Electrodes for Carbon Dioxide Reduction: A New Paradigm. ACS Energy Letters, 4, 317-324, DOI: 10.1021/acsenergylett.8b02035 (2018).

Zhou, X. and Xiang, C. Comparative Analysis of Solar-to-Fuel Conversion Efficiency: A Direct, One-Step Electrochemical CO2 Reduction Reactor versus a Two-Step, Cascade Electrochemical CO2 Reduction Reactor. ACS Energy Letters, DOI: 10.1021/acsenergylett.8b01077 (2018).

Jiang, J., Huang, Z., Xiang, C., Poddar, R., Lewerenz, H.-J., Papadantonakis, K. M., Lewis, N. S., and Brunschwig, B. Nanoelectrical and Nanoelectrochemical Imaging of Pt/p-Si and Pt/p+-Si Electrodes. ChenSusuChem, DOI: 10.1002/cssc.201700893 (2017).

Singh, M. R., Xiang, C., and Lewis, N. Evaluation of Flow Schemes for Near-Neutral Electrolytes in Solar-Fuels Generators. Sustainable Energy and Fuels, DOI: 10.1039/C7SE00062F (2017).

Zhou, X., Liu, R., Chen, Y., Verlage, E., Francis, S. A., Lewis, N. S., Xiang, C. Solar-Driven Reduction of 1 atm CO2 to Formate at 10% Energy-Conversion Efficiency by Use of a TiO2-Protected III-V Tandem Photoanode in Conjunction with a Bipolar Membrane and a Pd/C Cathode Electrocatalyst. ECS Transactions, 77(4), 31-41, DOI: 10.1149/07704.0031ecst (2017).

Chen, Y., Lewis, N. S. & Xiang, C. Modeling and Simulation of the Spatial and Light-Intensity Dependence of Product Distributions in an Integrated Photoelectrochemical CO2 Reduction System. ACS Energy Letters, DOI: 10.1021/acsenergylett.6b00134 (2016).

Verlage, E. et al. A Monolithically Integrated, Intrinsically Safe, 10% Efficient, Solar-Driven Water-Splitting System Based on Active, Stable Earth-Abundant Electrocatalysts in Conjunction with Tandem III-V Light Absorbers Protected by Amorphous TiO2 Films. Energy & Environmental Science, DOI: 10.1039/C5EE01786F (2015).

Walczak, K. et al. Modeling, Simulation, and Fabrication of a Fully Integrated, Acid-stable, Scalable Solar-Driven Water-Splitting System. ChemSusChem 8, 544-551, DOI: 10.1002/cssc.201402896 (2015).

Chen, Y., Hu, S., Xiang, C. & Lewis, N. A Sensitivity Analysis to Assess the Relative Importance of Improvements in Electrocatalysts, Light Absorbers, and System Geometry on the Efficiency of Solar-Fuels Generators. Energy & Environmental Science, DOI: 10.1039/C4EE02314E (2014).

Jin, J. et al. An experimental and modeling/simulation-based evaluation of the efficiency and operational performance characteristics of an integrated, membrane-free, neutral pH solar-driven water-splitting system. Energy & Environmental Science 7, 3371-3380, DOI: 10.1039/c4ee01824a (2014).

For a complete list of publications, see JCAP publications page.

Additional Information

Research Page:  http://sunlight.caltech.edu/cx/doku.php