Discovery of single, bi- and multimetallic atom-based photocatalysts on semimetallic titania support for H2 production from water

Energy and fuel production through solar light harvesting is one of the viable options to decrease carbon emissions. However, a valuable alternative to fossil fuels requires the development of cost-competitive materials. Semiconductor metal oxides are among the most widely adopted materials for solar energy conversion into chemical energy (H2), produced via photocatalytic water splitting.


Here, we aim to develop low-cost and energy-efficient artificial photosynthesis units to produce H2 from water. The system consists of TiO2 decorated with single-site catalysts, i.e., single-type atoms or a combination of atoms as co-catalyst.


We focus on synthesizing, discovering, and analyzing the effectiveness of newly designed catalysts based on single, bi-, or multi-atom decorated semiconductors intended for photocatalytic H2 evolution.


The result of this research can significantly enhance the normalized photocatalytic activity of the atomically decorated semiconductors compared to a conventional nanoparticle-decorated substrate.

Catalyzing Green Hydrogen Research at the U of A

Interview (Broadcast or Text)

Defect-Engineered TiO2 Nanosheets Decorated with Rhenium Co-Catalysts: A Promising Photocatalyst for Hydrogen Production

Shiva Mohajernia, Sadegh Pourali

Conference/Symposium/Workshop Contribution

Defect-Engineered TiO2 Supports for Pt Single-Atom Catalysts: Insights into HER from DFT Calculations

Shiva Mohajernia, Sadegh Pourali

Conference/Symposium/Workshop Contribution

Effect of Ultrasound-Induced Defects on Photocatalytic Hydrogen Evolution in Anatase Titania Nanotubes Decorated with Platinum Single Atoms

Shiva Mohajernia

Conference/Symposium/Workshop Contribution

Electrocatalytic Generation of H2 From Wastewater Using Pt decorated TiO2 Catalysts Isabella Smith, Ula Suliman, Dr. Shiva Mohajernia

Shiva Mohajernia, Isabella Smith, Ula Suliman

Conference/Symposium/Workshop Contribution

Energy Explorers Teacher Workshop

Ula Suliman

Other Event

Energy Explorers Teacher Workshop

Other Event

Energy Explorers for Science Literacy Week 2023 - WISEST

Ula Suliman

Other Event

Energy Explorers with Junior High Kids

Ula Suliman

Other Event

Exploring the decoration of nanostructured nickel sub-oxides with single atoms for energy conversion electrocatalysis

Visiting Researcher (incoming)

In situ Pt single-atom trapping on TiO2 nanotubes via ultrasonication: a one-pot approach to produce active electrodes for electrocatalytic H2 evolution

Shiva Mohajernia, Sadegh Pourali

Peer-Reviewed Journal Article

Mesoporous BiVO4 -based Photoelectrode in Water Splitting Photoreactor

Shiva Mohajernia, Ali Tavazohi

Conference/Symposium/Workshop Contribution

Minimal Size, Maximum Impact: The Role of Single-Atom Pt in Photocatalytic Hydrogen Production on TiO₂

Shiva Mohajernia

Conference/Symposium/Workshop Contribution

NRGMATs Energy Materials Group – Lab Tour Summary for Edmonton's Teachers

Sadegh Pourali

Other Event

Optimizing the Ultra-High Dispersion of Ir on NiO Nanosponge for Enhanced Oxygen Evolution Reaction

Shiva Mohajernia

Conference/Symposium/Workshop Contribution

Semimetallic Ti-based Bimetallic Oxide: Promising Electrode for Hydrogen Generation

Shiva Mohajernia, Ula Suliman

Conference/Symposium/Workshop Contribution

Two visitors from University of Siegen - Germany

Other Event

pH-Tuning Strategy for Spontaneous Deposition of Pt Single Atoms on TiO2 Nanosheets

Sadegh Pourali

Conference/Symposium/Workshop Contribution