Carbon Nanodots for All-in-One Photocatalytic Hydrogen Generation

Jana B, Reva Y, Scharl T, Strauss V, Cadranel A, Guldi DM (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Book Volume: 143

Pages Range: 20122-20132

Journal Issue: 48

DOI: 10.1021/jacs.1c07049

Abstract

Carbon nanodots (CNDs) were photochemically altered to produce dihydrogen under light irradiation. Within the complex structure of CNDs, photo-oxidation takes place at citrazinic acid molecular fluorophore sites. Important is the fact that the resulting CND materials have a dual function. On one hand, they absorb light, and on the other hand, they photo- and electrocatalytically produce dihydrogen from water and seawater, without any external photosensitizer or cocatalyst. Record HER activities of 15.15 and 19.70 mmol(H2) g(catalyst)-1 h-1 were obtained after 1 h of 75 mW/cm2 Xe lamp illumination, from water and seawater, respectively. This impressive performance outweighs the remaining structural uncertainties. A full-fledged physicochemical investigation based on an arsenal of steady-state and time-resolved spectroscopic characterizations together with microscopy enabled a comprehensive look into the reaction mechanism. For an efficient dihydrogen formation, a precatalytic activation by means of reduction with a sacrificial electron donor is imperative.

Authors with CRIS profile

Involved external institutions

Max-Planck-Institut für Kolloid- und Grenzflächenforschung / Max Planck Institute of Colloids and Interfaces Germany (DE)

How to cite

APA:

Jana, B., Reva, Y., Scharl, T., Strauss, V., Cadranel, A., & Guldi, D.M. (2021). Carbon Nanodots for All-in-One Photocatalytic Hydrogen Generation. Journal of the American Chemical Society, 143(48), 20122-20132. https://dx.doi.org/10.1021/jacs.1c07049

MLA:

Jana, Bikash, et al. "Carbon Nanodots for All-in-One Photocatalytic Hydrogen Generation." Journal of the American Chemical Society 143.48 (2021): 20122-20132.

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