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SUMMARY:Designing Single-atom Catalysts and Nanocatalysts for Hydrogen Pro
 duction and Utilization - Professor Taeghwan Hyeon - 1 Center for Nanopart
 icle Research\, Institute for Basic Science (IBS)\, 2 School of Chemical a
 nd Biological Engineering\, Seoul National University\, Seoul
DTSTART:20260303T150000Z
DTEND:20260303T160000Z
UID:TALK245104@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:Abstract:\nFor the last decade\, our group has developed sever
 al synthetic methods to produce single-atom catalysts and nanocatalysts fo
 r photo-& electro-catalytic hydrogen production and utilization. We report
  highly active single-atom Cu/TiO2 photocatalysts for hydrogen generation 
 and CO2 photoreduction (Nature Mater. 2019\, 18\, 620\; Energy Environ. Sc
 i. 2022\, 15\, 601). We demonstrated a general method for synthesizing ato
 mically dispersed (photo)catalysts via photochemical defect tuning for con
 trolling oxygen vacancy dynamics (Nature Mater. 2024\, 23\, 552). We prese
 nted a floatable photocatalytic platform constructed from elastomer-hydrog
 el nanocomposites\, demonstrating its superiority over conventional system
 s in solar hydrogen production (Nature Nanotech. 2023\, 18\, 754). We prop
 ose a strategy involving polymeric stabilization of photocatalytic centers
  uniquely localized at the gas-liquid interface\, substantially enhancing 
 both catalytic activity and stability (Nature Nanotech. 2025\, 20\, 1237).
 \n\nElectrocatalytic oxygen evolution reaction (OER) plays a pivotal role 
 in the mass production of hydrogen fuel and chemical feedstocks (ACS Energ
 y Lett. 2026\, 11\, 245). We report that doping aluminum (Al) into RuO2 (I
 r-free) and RuIrOx (low-Ir) leads to outstanding activity and excellent du
 rability for OER at a high current density (Chem 2023\, 9\, 3600). When ac
 id-stable d0-metal\, Ta\, is atomically incorporated into RuO2\, the resul
 ting Ta1/RuO2 catalyst demonstrates exceptional OER performance (J. Am. Ch
 em. Soc. 2025\, 147\, 16179). We report on the activation of Ir-doped CoMn
 2O4 in acidic electrolyte that leads to enhanced activity and stability in
  acidic OER for long-term PEMWE operation (J. Am. Chem. Soc. 2025\, 147\, 
 2369). We demonstrated that Ta-doped Co3O4 exhibits low overpotential\, wh
 ile maintaining high catalytic activity for over 140 hours in acidic OER (
 Energy Environ. Sci. 2024\, 17\, 3628). We found that a tiny amount of Pt 
 incorporated within the Co3O4 spinel lattice can function as a redox-activ
 e buffer\, diverting oxidative stress away from the cobalt matrix during O
 ER (Adv. Mater. In Press\,adma.202522703). We demonstrate that active mach
 ine-learning on even small datasets – but supplemented by informative st
 ructural-characterization data and coupled with close-loop experimentation
  – can discover a “champion” four-metal perovskite oxide OER catalys
 t (Nature Mater. 2024\, 23\, 108).\n\nWe synthesized highly active and sta
 ble electrocatalysts for hydrogen peroxide (H2O2) production including Co-
 N4(O) moiety incorporated in nitrogen-doped graphene (Co1-NG(O)) (Nature M
 ater. 2020\, 19\, 436)\, cobalt phthalocyanine (CoPc) immobilized on oxidi
 zed carbon nanotube substrate (Nature Catal. 2023\, 6\, 234)\, and cobalt 
 single atoms on hierarchical porous nanofibers (Adv. Mater. 2025\, 37\, 24
 18489). We present a synthesis of highly durable and active fuel cell elec
 trocatalysts based on ordered M-Pt alloy nanoparticles for oxygen reductio
 n reaction (ORR) in PEMFC (J. Am. Chem. Soc. 2015\, 137\, 15478\; J. Am. C
 hem. Soc. 2020\, 142\, 14190\; Energy Environ. Sci. 2023\, 16\, 1146).\n \
 n\nBio:\nTaeghwan Hyeon received B.S. (1987) & M.S. (1989) degrees from Se
 oul National University (SNU)\, and Ph.D. degree (1996) from UIUC\, all in
  Chemistry Department. He is a SNU Distinguished Professor\, and a Directo
 r of Center for Nanoparticle Research of Institute for Basic Science (IBS)
 . He is recognized for his outstanding contributions in scalable synthesis
  of uniform-sized nanoparticles and related nanomaterials for energy & cat
 alysis & medical applications. He was listed in Highly Cited Researcher (2
 014~25)\, and chosen as 2020 Citation Laureate in Chemistry. He received 2
 022 Grand Prize of National Academy of Engineering of Korea (NAEK)\, 2016 
 Presidential Best Scientist Award\, 2012 Samsung Hoam Prize\, and 2008 POS
 CO-T.J. Park Award. He is an elected Member of KAST&NAEK in Korea\, US Nat
 ional Academy of Engineering (NAE)\, Royal Swedish Academy of Engineering 
 Sciences (IVA)\, and Royal Society of Chemistry. From 2010 to 2020\, he se
 rved as Associate Editor of JACS\, and now of ACS Nano.\n 
LOCATION:Dept. of Chemistry\, Unilever Lecture Theatre
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