DataVXACS Applied Materials & InterfacesPaper
journal article·2016-01-13Open access

CuO-Functionalized Silicon Photoanodes for Photoelectrochemical Water Splitting Devices

Yuanyuan Shi, Carolina Gimbert-Suriñach, Tingting Han, Serena Berardi, Mario Lanza, Antoni Llobet

ACS Applied Materials & Interfaces· Volume 8· Issue 1
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Abstract

One main difficulty for the technological development of photoelectrochemical (PEC) water splitting (WS) devices is the fabrication of active, stable and cost-effective photoelectrodes that ensure high performance. Here, we report the development of a CuO/Silicon based photoanode, which shows an onset potential for the water oxidation of 0.53 V vs SCE at pH 9, that is, an overpotential of 75 mV, and high stability above 10 h. These values account for a photovoltage of 420 mV due to the absorbed photons by silicon, as proven by comparing with analogous CuO/FTO electrodes that are not photoactive. The photoanodes have been fabricated by sputtering a thin film of Cu(0) on commercially available n-type Si wafers, followed by a photoelectrochemical treatment in basic pH conditions. The resulting CuO/Cu layer acts as (1) protective layer to avoid the corrosion of nSi, (2) p-type hole conducting layer for efficient charge separation and transportation, and (3) electrocatalyst to reduce the overpotential of the water oxidation reaction. The low cost, low toxicity, and good performance of CuO-based coatings can be an attractive solution to functionalize unstable materials for solar energy conversion.
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Research context

Metals & alloysCatalysis & surfaces

OpenAlex topics: Copper-based nanomaterials and applications · ZnO doping and properties · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano and Soft Materials, Soochow University, Collaborative Innovation Center of Suzhou Nano Science and Technology, 199 Ren-Ai Road, 215123 Suzhou, China

Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Avinguda Països Catalans, 16, 43007 Tarragona, Spain

Departament de Química, Universitat Autònoma de Barcelona (UAB), 08193 Cerdanyola del Vallès, Barcelona, Spain

Funding

Ministry of Science and Technology of the People's Republic of China · Ministerio de Economía y Competitividad · Institut Català d'Investigació Química · European Cooperation in Science and Technology · Directorate-General for Research and Innovation · National Natural Science Foundation of China · Agència de Gestió d'Ajuts Universitaris i de Recerca · Central People's Government of the People's Republic of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona · Young Scientists Fund of Basic Research, Government of Jiangsu Province

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