Black Magic in Gray Titania: Noble-Metal-Free Photocatalytic H2 Evolution from Hydrogenated Anatase

Liu N, Zhou X, Nguyen NT, Peters K, Zoller F, Hwang I, Schneider C, Miehlich M, Freitag D, Meyer K, Fattakhova-Rohlfing D, Schmuki P (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Chemsuschem Wiley-VCH Verlag

Book Volume: 10

Pages Range: 62-67

Journal Issue: 1

DOI: 10.1002/cssc.201601264

Abstract

‘Black’ TiO2—in the widest sense, TiO2reduced by various treatments—has attracted tremendous scientific interest in recent years because of some outstanding properties; most remarkably in photocatalysis. While the material effects visible light absorption (the blacker, the better), black titania produced by high pressure hydrogenation was recently reported to show another highly interesting feature; noble-metal-free photocatalytic H2generation. In a systematic investigation of high-temperature hydrogen treatments of anatase nanoparticles, TEM, XRD, EPR, XPS, and photoelectrochemistry are used to characterize different degrees of surface hydrogenation, surface termination, electrical conductivity, and structural defects in the differently treated materials. The materials’ intrinsic activity for photocatalytic hydrogen evolution is coupled neither with their visible light absorption behavior nor the formation of amorphous material, but rather must be ascribed to optimized and specific defect formation (gray is better than black). This finding is further confirmed by using a mesoporous anatase matrix as a hydrogenation precursor, which, after conversion to the gray state, even further enhances the overall photocatalytic hydrogen evolution activity.

Authors with CRIS profile

Ning Liu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Xuemei Zhou Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Nhat Truong Nguyen Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Imgon Hwang Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Christopher Schneider Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Matthias Miehlich Lehrstuhl für Anorganische und Allgemeine Chemie Detlef Freitag
Karsten Meyer Lehrstuhl für Anorganische und Allgemeine Chemie Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Involved external institutions

Ludwig-Maximilians-Universität (LMU) DE Germany (DE)

How to cite

APA:

Liu, N., Zhou, X., Nguyen, N.T., Peters, K., Zoller, F., Hwang, I.,... Schmuki, P. (2017). Black Magic in Gray Titania: Noble-Metal-Free Photocatalytic H2 Evolution from Hydrogenated Anatase. Chemsuschem, 10(1), 62-67. https://dx.doi.org/10.1002/cssc.201601264

MLA:

Liu, Ning, et al. "Black Magic in Gray Titania: Noble-Metal-Free Photocatalytic H2 Evolution from Hydrogenated Anatase." Chemsuschem 10.1 (2017): 62-67.

BibTeX: Download