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Research interests

Energy Materials We use solid-state chemistry methods to identify, synthesise and characterise new solid state materials that may underpin future energy technologies. The aim is to understand the relation between composition, structure and functional properties. Areas of interest are: 1. Thermoelectric Energy Conversion This is a solid state method to convert heat into electricity (or vice versa) and should be considered an energy saving technology where waste heat from for example industrial processes is converted into electricity. The aim of the research is to discover materials with improved energy conversion efficiencies. Current research is focused on semiconducting intermetallic phases prepared via ultra-high temperature reactions.   Figure 1. Schematic of a thermoelectric power generation device with a TiCoSb half-Heusler intermetallic p-type leg. 2. High-Temperature Superconductors Superconductors carry electrical currents without resistive losses and expel applied magnetic fields. This has potential uses in the electrical power grid and in electronics. Current applications include high-field magnets used in MRI and in Maglev trains. However, wide scale implementation has been limited as the operating temperatures of all known superconductors are well below room temperature. Our research is focused on the iron based high-Tc superconductors, which have critical temperatures up to 55 K.   Figure 2. Left: Zero resistance below 51 K for TbFeAsO0.9F0.1. Right: Crystal structure of the RFeAs(O,F) high-Tc superconductors (R = rare-earth). 3. Electrocatalysts for Water Splitting The current bottleneck in the splitting of water is the dioxygen formation reaction. Our research is focussed on developing improved electrocatalysts for this reaction by studying a variety of transition metal oxides. Figure 3. Electrochemical oxidation of water using a catalyst, e.g. RuO2.

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Research Output 2001 2019

  • 65 Article
  • 1 Conference contribution
  • 1 Comment/debate

Spontaneous formation of nanostructures during pulsed laser deposition of epitaxial half-Heusler TiNiSn on MgO(001)

Webster, R. W. H., Halpin, J. E., Popuri, S. R., Bos, J-W. G. & Maclaren, D. A., Jan 2019, In : APL Materials. 7, 1, 013206

Research output: Contribution to journalArticle

Open Access
File
Pulsed laser deposition
Titanium
Epitaxial growth
Nanostructures
Titanium oxides

Critical mode and band-gap-controlled bipolar thermoelectric properties of SnSe

Loa, I., Popuri, S. R., Fortes, A. D. & Bos, J. W. G., 13 Aug 2018, In : Physical Review Materials. 2, 8, 085405

Research output: Contribution to journalArticle

Open Access
File

Grain by grain compositional variations and interstitial metals – a new route towards achieving high performance in half-Heusler thermoelectrics

Barczak, S., Halpin, J., Buckman, J., Decourt, R., Pollet, M., Smith, R. I., MacLaren, D. A. & Bos, J-W. G., 7 Feb 2018, In : ACS Applied Materials and Interfaces. 10, 5, p. 4786–4793 8 p.

Research output: Contribution to journalArticle

Open Access
File
interstitials
routes
thermal conductivity
metals
thermoelectric materials

Impact of Interstitial Ni on the Thermoelectric Properties of the Half-Heusler TiNiSn

Barczak, S., Buckman, J., Smith, R. I., Baker, A. R., Don, E., Forbes, I. & Bos, J-W. G., 30 Mar 2018, In : Materials. 11, 4, 536

Research output: Contribution to journalArticle

Open Access
File

Impact of Nb vacancies and p-type doping of the NbCoSn-NbCoSb half-Heusler thermoelectrics

Ferluccio, D., Smith, R. I., Buckman, J. & Bos, J-W. G., 14 Feb 2018, In : Physical Chemistry Chemical Physics. 20, 6, p. 3979-3987 9 p.

Research output: Contribution to journalArticle

Open Access
File
substitutes
figure of merit
solid solutions
thermal conductivity
disorders

Datasets

Dataset for Substitution versus full-Heusler segregation in TiCoSb

Asaad, M. (Creator), Buckman, J. (Creator), Bos, J. G. (Creator), Heriot-Watt University, 9 Nov 2018

Dataset