Can you combine elemental gold and boron? Is it possible to combine gold and boron to form compounds? A simple example being:

$$
\ce{Au + B -&gt; AuB}
$$
Yes, gold and boron can bond with each other to form alloy clusters. They are very important in semiconductor industry and used in fabrication process. Here(1) is a short note on gold-boron alloy:


  Photoelectron spectroscopy and density-functional theory are combined to investigate the electronic and structural properties of a
  series of $\ce{B-Au}$ alloy clusters: $\ce{B6Au_{n}^{−}}$ and
  $\ce{B6Au_{n}}$ ($\ce{n = 1−3}$). Rich spectral features are
  observed for each species, and vibrational structures are resolved for
  numerous detachment transitions of $\ce{B6Au^−}$ and
  $\ce{B6Au^{2−}}$. Electron affinities of $\ce{B6Au_{n} (n = 1−3)}$ are
  evaluated to be 2.70 ± 0.03, 2.91 ± 0.02, and 3.21 ± 0.05 eV,
  respectively. Global structural searches are performed for both the
  anions and their neutrals. The calculated electronic binding energies
  are compared with experimental measurements to establish the anion
  global-minimum structures and their corresponding neutral states.
  The ground-state structures of these clusters are shown to be planar
  or quasi-planar with an elongated B6core, to which the first and
  second Au atoms are bonded terminally and the third Au in a bridging
  position. All three anion clusters are π antiaromatic.
  Natural bond orbital analyses show that the $\ce{B-Au}$ bonding is
  highly covalent, providing new examples for the $\ce{Au/H}$ analogy
  in Au alloy clusters.


You can find more information about gold-boron alloy clusters in the reference below.

Reference


The Journal of Chemical Physics 138, 084306 (2016); doi: http://dx.doi.org/10.1063/1.4792501
https://www.google.com/patents/US3211550
https://www.ncbi.nlm.nih.gov/pubmed/23901981
http://aip.scitation.org/doi/10.1063/1.4816010
https://www.researchgate.net/publication/235886590_On_the_structures_and_bonding_in_boron-gold_alloy_clusters_B6Aun-_and_B6Aun_n_1-3
http://www.google.co.in/patents/US3137595