Publications by Meng Xia | EPFL Graph Search

Cuprous oxide-Shewanella mediated photolytic hydrogen evolution

Christos Comninellis, Michael Graetzel, Nikolaos Vlachopoulos, Kevin Sivula, Linfeng Pan, Meng Xia, Michele Morgante

However, its green production process is expensive, involving water electrolysis, which requires a significant amount of energy. New technologies have been developed to decrease the cost associated with water electrolysis, such as using microbial electroly ...

2025

Surface and Electrolyte Engineering on Semiconductor Electrodes for solar-assisted CO2 Reduction

Meng Xia

Since the 1760s, modern civilization has significantly enhanced human efficiency and living standards, whereas it heavily depends on fossil fuels for primary energy. The overreliance raises concerns about energy and environmental crises. It prompts the nee ...

EPFL2024

Research data supporting "High carrier mobility along the [111] orientation in Cu2O photoelectrodes"

Michael Graetzel, Paul Joseph Dyson, Ulf Anders Hagfeldt, Jingshan Luo, Linfeng Pan, Lu Chen, Dan Ren, Meng Xia

Included in the dataset are detailed information into the crystallography, morphology, electronic properties, (photo)electrochemical and carrier dynamics of both single-crystal Cu2O thin films and polycrystalline Cu2O with favored crystal orientations. Mul ...

Apollo - University of Cambridge Repository2024

High carrier mobility along the [111] orientation in Cu2O photoelectrodes

Michael Graetzel, Paul Joseph Dyson, Ulf Anders Hagfeldt, Linfeng Pan, Lu Chen, Dan Ren, Meng Xia

Solar fuels offer a promising approach to provide sustainable fuels by harnessing sunlight(1,2). Following a decade of advancement, Cu2O photocathodes are capable of delivering a performance comparable to that of photoelectrodes with established photovolta ...

Nature Portfolio2024

[Correction] High carrier mobility along the [111] orientation in Cu2O photoelectrodes (vol 628, pg 765, 2024)

Michael Graetzel, Paul Joseph Dyson, Ulf Anders Hagfeldt, Linfeng Pan, Lu Chen, Dan Ren, Meng Xia

NATURE PORTFOLIO2024

Bifunctional hole-shuttle molecule for improved interfacial energy level alignment and defect passivation in perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jun Ho Yum, Kevin Sivula, Dan Ren, Jing Gao, Meng Xia, Felix Thomas Eickemeyer, Zhongjin Shen

Interface engineering in perovskite solar cells is key to high performance. Now, You et al. design an interlayer that both passivates defects and improves the energy level alignment between the perovskite and hole transport material. ...

NATURE PORTFOLIO2023

Efficient Cu2O Photocathodes for Aqueous Photoelectrochemical CO2 Reduction to Formate and Syngas

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mounir Driss Mensi, Kevin Sivula, Linfeng Pan, Yongpeng Liu, Dan Ren, Jing Gao, Meng Xia, Jun Li

Photoelectrochemical carbon dioxide reduction (PEC-CO2R) represents a promising approach for producing renewable fuels and chemicals using solar energy. However, attaining even modest solar-to-fuel (STF) conversion efficiency often necessitates the use of ...

Amer Chemical Soc2023

Photoelectrochemical CO2 Reduction at a Direct CuInGaS2/Electrolyte Junction

Michael Graetzel, Jun Ho Yum, Kevin Sivula, Nestor Guijarro Carratala, Yongpeng Liu, Simon Nussbaum, Dan Ren, Meng Xia

Photoelectrochemical (PEC) CO2 reduction has received considerable attention given the inherent sustainability and simplicity of directly converting solar energy into carbonbased chemical fuels. However, complex photocathode architectures with protecting l ...

AMER CHEMICAL SOC2023

Covalent Organic Framework Nanoplates Enable Solution-Processed Crystalline Nanofilms for Photoelectrochemical Hydrogen Evolution

Michael Graetzel, Kevin Sivula, Yongpeng Liu, Meng Xia

As covalent organic frameworks (COFs) are coming of age, the lack of effective approaches to achieve crystalline and centimeter-scale-homogeneous COF films remains a significant bottleneck toward advancing the application of COFs in optoelectronic devices. ...

AMER CHEMICAL SOC2022

Transparency and Morphology Control of Cu2O Photocathodes via an in Situ Electroconversion

Michael Graetzel, Kevin Sivula, Linda Lazouni, Rebekah Anne Wells, Simon Nussbaum, Marina Caroline Michèle Caretti, Dan Ren, Meng Xia

2022

Solar reduction of carbon dioxide on copper-tin electrocatalysts with energy conversion efficiency near 20%

Michael Graetzel, Shaik Mohammed Zakeeruddin, Yuhang Liu, Dan Ren, Jing Gao, Meng Xia, Jun Li

Solar-driven carbon dioxide reduction has witnessed a renaissance in the past decades, but the system suffers from low reaction rates. Here the authors develop a copper/tin-oxide electrocatalyst, achieving a new benchmark solar-to-CO energy conversion effi ...

Nature Portfolio2022

Spectroelectrochemical and Chemical Evidence of Surface Passivation at Zinc Ferrite (ZnFe 2 O 4 ) Photoanodes for Solar Water Oxidation

Michael Graetzel, Mounir Driss Mensi, Kevin Sivula, Nestor Guijarro Carratala, Liang Yao, Yongpeng Liu, Dan Ren, Meng Xia

Recent advances in low‐cost manufacturing as well as in bulk/interface engineering have positioned zinc ferrite (ZnFe2O4, ZFO) in the spotlight as a candidate material for solar water oxidation. However, the severe recombination at the reactive interface r ...

2021

Identifying Reactive Sites and Surface Traps in Chalcopyrite Photocathodes

Michael Graetzel, Mounir Driss Mensi, Kevin Sivula, Nestor Guijarro Carratala, Liang Yao, Yongpeng Liu, Meng Xia

Gathering information on the atomic nature of reactive sites and trap states is key to fine tuning catalysis and suppressing deleterious surface voltage losses in photoelectrochemical technologies. Here, spectroelectrochemical and computational methods wer ...

Wiley-VCH Verlag GmbH2021

A hybrid bulk-heterojunction photoanode for direct solar-to-chemical conversion dagger

Michael Graetzel, Jun Ho Yum, Kevin Sivula, Nestor Guijarro Carratala, Arvindh Sekar, Liang Yao, Barbara Alexandra Primera Darwich, Yongpeng Liu, Rebekah Anne Wells, Dan Ren, Han-Hee Cho, Meng Xia

Organic semiconductors (OSs) are emerging candidates as light-harvesting materials in photoelectrochemical (PEC) cells for direct solar-to-chemical conversion. Despite significant recent progress with OS-based photocathodes, the development of efficient an ...

ROYAL SOC CHEMISTRY2021

Effects of co-doped barium cerate additive on morphology, conductivity and electrochemical properties of samarium doped ceria electrolyte for intermediate temperature solid oxide fuel cells

Xinchao Wang, Jianing Li, Yongpeng Liu, Chiara Bonati, Meng Xia, Xin Wang

The composite of samarium doped ceria (Sm0.2Ce0.8O2-delta, SDC) and co-doped barium cerate (BaZr0.1Ce0.7Y0.1Yb0.1O3-delta, BZCYYb) is prepared by mechanical mixing and investigated as electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFC ...

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