Graphene-Semiconductor Catalytic Nanodiodes for Quantitative Detection of Hot Electrons Induced by a Chemical Reaction

Nano Letters
Hyosun LeeJeong Young Park

Abstract

Direct detection of hot electrons generated by exothermic surface reactions on nanocatalysts is an effective strategy to obtain insight into electronic excitation during chemical reactions. For this purpose, we fabricated a novel catalytic nanodiode based on a Schottky junction between a single layer of graphene and an n-type TiO2 layer that enables the detection of hot electron flows produced by hydrogen oxidation on Pt nanoparticles. By making a comparative analysis of data obtained from measuring the hot electron current (chemicurrent) and turnover frequency, we demonstrate that graphene's unique electronic structure and extraordinary material properties, including its atomically thin nature and ballistic electron transport, allow improved conductivity at the interface between the catalytic Pt nanoparticles and the support. Thereby, graphene-based nanodiodes offer an effective and facile way to approach the study of chemical energy conversion mechanisms in composite catalysts with carbon-based supports.

References

Oct 23, 2004·Science·K S NovoselovA A Firsov
Jun 2, 2006·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jeong Young Park, Gabor A Somorjai
Oct 13, 2006·Chemical Reviews·Christian Frischkorn, Martin Wolf
Jul 31, 2007·Nature Materials·F SchedinK S Novoselov
Feb 21, 2008·Nano Letters·Alexander A BalandinChun Ning Lau
Sep 4, 2008·Physical Review Letters·G GiovannettiP J Kelly
Nov 14, 2008·Angewandte Chemie·Gabor A Somorjai, Jeong Y Park
Sep 8, 2009·Nano Letters·Antoine HervierGabor A Somorjai
Jun 24, 2010·Nano Letters·Sang Hoon JooGabor A Somorjai
Jun 9, 2011·Journal of the American Chemical Society·Junseok LeeXingyi Deng
Jul 23, 2011·Nature Materials·Alexander A Balandin
Sep 14, 2012·Chemical Communications : Chem Comm·Yu-Ping XiaoLi-Jun Wan
Oct 13, 2012·Nature·K S NovoselovK Kim
Aug 28, 2013·Nano Letters·Kyung-Eun ByunKinam Kim
Mar 21, 2015·Chemical Reviews·Jeong Young ParkGabor A Somorjai
May 28, 2015·Angewandte Chemie·Florencia CalazaHans-Joachim Freund
Jul 17, 2015·Accounts of Chemical Research·Jeong Young ParkIevgen I Nedrygailov

❮ Previous
Next ❯

Citations

Jul 11, 2018·Chemical Communications : Chem Comm·Kalyan C GoddetiJeong Young Park
Feb 28, 2019·Faraday Discussions·Hyosun LeeJeong Young Park
Dec 3, 2016·The Review of Scientific Instruments·Ievgen I NedrygailovJeong Young Park
May 11, 2018·Scientific Reports·Kalyan C GoddetiJeong Young Park
Jan 6, 2021·Nature Communications·Si Woo LeeJeong Young Park
Feb 16, 2021·ACS Applied Materials & Interfaces·Beomjoon JeonJeong Young Park
Dec 21, 2019·ACS Omega·Ievgen I NedrygailovJeong Young Park
Feb 26, 2020·Nano Letters·Hyun Uk ChaeRehan Kapadia
Dec 10, 2016·ACS Applied Materials & Interfaces·Nathan J Ray, Eduard G Karpov
Apr 4, 2019·ACS Applied Materials & Interfaces·Beomjoon JeonJeong Young Park

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.